PRP Top - Top discoverers

Top discoverers by number of PRPs

Rank	Discoverer	Score
1	Tony Prest / Never Odd Or Even	103856
2	Stefano Morozzi	37888
3	Lelio R Paula	31241
4	Patrick De Geest	21223
5	Enzo Doria	14689
6	Syoichiro Yamada	13745
7	Robert Price	12533
8	Paul Bourdelais	8897
9	Ray Chandler	8631
10	David Broadhurst	7813
11	Gilbert Mozzo	4720
12	Milton L. Brown	3224
13	Donovan Johnson	3116
14	Serge Batalov	3028
15	Kimmo Herranen	2745
16	Norbert Schneider	2578
17	Mike Oakes	2437
18	Yves Minet	2220
19	Hans Havermann	1604
20	Bernardo Boncompagni	1489
21	Henri Lifchitz	1475
22	Andrey Kulsha	801
23	Frank Doornink	796
24	Jorge Menendez	702
25	Wayne Halsdorf	674
26	Makoto Morimoto	627
27	Jason Earls	614
28	Joe McLean	594
29	Jim Fougeron	580
30	Jens K. Andersen	573
31	Anatoly F. Selevich	475
32	Kenneth Egtved Pedersen	422
33	Robert Smith	374
34	Paul Underwood	336
35	Erik Branger	331
36	Eric Chen	319
37	Alfred Reich	291
38	Tyler Busby	277
39	Maksym Voznyy	271
40	Richard Fischer	232
41	Gary Barnes	170
42	Gary Chaffey	162
43	Ryan C Weaving	158
44	Anonymous	155
45	Ryan Propper	151
46	Jon Grantham	129
47	Markus Hiltbrunner	123
48	Kevin Acres	109
49	Michael Porter	105
50	Paul Vanderveen	100
51	Harald Ritter	94
52	Matt Stath	93
52	Jean-Louis Charton	93
54	Jiahao He	91
55	Daniel Heuer	80
56	T. D. Noe	79
57	Sinkiti Sibata	71
57	Paul Leyland	71
59	Dmitry Domanov	68
60	Curtis Bright	61
61	Eric W. Weisstein	58
61	Pedja Terzic	58
63	Norman Luhn	57
64	Sander Hoogendoorn	54
65	D.Broadhurst and W.Edgington	53
66	Michael Vang	52
67	Sujan Das	50
68	Renaud Lifchitz	49
69	Makoto Kamada	48
70	Theodore Burton	45
71	Mark Rodenkirch	44
71	Arkadiusz Wesolowski	44
73	Nicolas PALAU	43
74	Patrick Schmeer	39
75	Riley Fisher	37
76	Thomas Masser	36
77	Cletus Emmanuel	30
78	Kellen Shenton	27
78	Harvey Dubner	27
78	Faysal YAtim	27
81	Robinas Birthday	26
82	Youcef Lemsafer	25
83	Greg Childers	24
84	Paul Schmidt	23
85	Jinyuan Wang	22
85	Martin Hopf	22
85	Wojciech Florek	22
88	Danilo Nitsche	20
88	Tom Wu	20
88	Aurel Gibier	20
88	Boyan Hu	20
92	Rob Binnekamp	19
92	Gord Palameta	19
92	Gabor Levai	19
92	Joel Levy	19
96	Predrag Minovic	18
96	Ken Davis	18
98	Robert Kinser	17
98	Bouk de Water	17
100	Rytis Slatkevicius	16
100	Yaroslav Berezhko	16
102	Harrison Mesh	15
103	Alex_soldier	14
104	Poliagapitos	13
104	Thomas Ritschel	13
106	Alexander Zhirkov	12
107	Nik Lygeros / Olivier Rozier	11
107	Ryan Propper + Sergey Batalov	11
109	Marcin Lipinski	10
109	Raffi Chaglassian	10
109	Sergey Batalov	10
109	Hayden Chesnut	10
109	Michael Stocker	10
114	Kamil Duszenko	9
114	Tyler NeSmith	9
114	Alexander Kuzmich	9
114	Dario Alpern	9
114	D. Broadhurst & B. de Water	9
114	Darren Bedwell	9
120	M. Frind & P. Underwood	8
120	Leonid Muraviov	8
120	Nik Lygeros / Olivier Rozier / LR team	8
120	Walter Nissen	8
120	Anton Vrba	8
125	Jean Penné	7
125	Karsten Bonath	7
125	H.&R. Lifchitz	7
125	James G. Merickel	7
129	Dirk Augustin	6
129	Jason Yuen	6
129	Mischa Rodermond	6
132	Payam Samidoost	5
132	Pierre CAMI	5
132	Borys Jaworski	5
132	Harsh Aggarwal	5
132	Miklos Levai	5
132	Marisa Kirisame	5
138	Décio Gazzoni Filho	4
138	Dylan Delgado	4
138	Marek Hubal	4
138	V.M.Ulyanov	4
138	Jeppe Stig Nielsen	4
138	Anand Nair	4
144	Ben Maloney / Five or Bust	3
144	Richard McIntosh	3
144	Alexander Gramolin	3
144	Phil Moore	3
144	Hugo Platzer	3
144	Jiong Sun	3
144	Giovanni Di Maria	3
144	D. Gazzoni Filho & Lucas Teixeira	3
144	Paul Jobling	3
144	Alexander Weiss	3
144	Meng-Hsuan Wu	3
144	Akihiko Yoshida	3
144	Matthias Baur	3
157	Ray Ballinger	2
157	Andy Klingeleers	2
157	Andy Steward	2
157	Leonid Durman	2
157	Lewis,Jobling,Nash	2
157	Ed Pegg	2
157	Dmitry Kamenetsky	2
157	Rubén Blanco	2
157	Peter Liaskovsky	2
157	Markus Tervooren	2
157	Michael Kwok	2
157	Valeryi Kuryshev	2
157	Peter Lesala	2
157	Steven Harvey	2
157	Engracio Esmenda / Five or Bust	2
157	Ananda Tallur & Jean-Louis Charton	2
157	J. Alm & D. Johnson	2
174	Tony Reix / Diepeveen-Underwood -Reix	1
174	Tapashree & Jainam	1
174	Vincent Diepeveen	1
174	Sean A. Irvine	1
174	Yusuf AttarBashi	1
174	William Garnett	1
174	Tetsuya Kobayashi	1
174	Lew Baxter	1
174	Guido Smetrijns	1
174	Giovanni La Barbera	1
174	GIMPS-fre_games	1
174	Göran Hemdal	1
174	Hugo Pfoertner	1
174	Jorge Coveiro	1
174	Jeff Gilchrist /Diepeveen-Reix-Underwood-Gilchrist	1
174	Eden Avidan / Naegi Makoto	1
174	Ed Trice	1
174	Cyclamen Persicum	1
174	Connor Deptuck	1
174	D.Broadhurst and M.Kamada	1
174	D.Broadhurst and N.Mandela	1
174	Ed T. Prothro	1
174	Dudley Fox	1
174	Kurt Beschorner	1
174	Leonardo Ottaviano	1
174	Paul Bourdelais, Harvey Dubner	1
174	paolo galliani	1
174	Oliver Kruse	1
174	Peter Kaiser	1
174	Phil Carmody	1
174	Polly T. Wang	1
174	Platon Sovilj	1
174	Nuutti Kuosa	1
174	MohamedReda Kebbaj	1
174	Logan Mesh	1
174	Adrian Bondrescu	1
174	Luke W. Richards	1
174	Matthew Peets	1
174	Michael Eaton	1
174	Matthias Wurtinger	1
174	Richard FitzHugh	1

Top discoverers by production score^*

Rank	Discoverer	Score
1	Ryan Propper + Sergey Batalov	53.4706
2	Ryan Propper	53.1039
3	Paul Bourdelais	52.0332
4	Anonymous	51.2562
5	Enzo Doria	50.9859
6	Jeff Gilchrist /Diepeveen-Reix-Underwood-Gilchrist	50.9036
7	Eden Avidan / Naegi Makoto	50.7167
8	Tony Prest / Never Odd Or Even	50.4677
9	Stefano Morozzi	50.2208
10	GIMPS-fre_games	50.1446
11	Engracio Esmenda / Five or Bust	49.8812
12	Gord Palameta	49.3233
13	Oliver Kruse	49.0532
14	Gabor Levai	48.8672
15	Robert Price	48.7661
16	Serge Batalov	48.7541
17	Hans Havermann	48.5131
18	Tyler Busby	48.0832
19	Jon Grantham	48.0806
20	Henri Lifchitz	47.9985
21	Ben Maloney / Five or Bust	47.7568
22	Alfred Reich	47.6676
23	Kellen Shenton	47.6574
24	Lelio R Paula	47.4747
25	Patrick De Geest	47.3257
26	Tony Reix / Diepeveen-Underwood -Reix	47.2269
27	Rytis Slatkevicius	47.1256
28	Boyan Hu	47.1236
29	Curtis Bright	47.1095
30	Nik Lygeros / Olivier Rozier / LR team	47.1065
31	Anand Nair	47.0205
32	Sergey Batalov	46.8860
33	Makoto Morimoto	46.7970
34	Peter Kaiser	46.6330
35	Nik Lygeros / Olivier Rozier	46.5672
36	Jean-Louis Charton	46.4485
37	Frank Doornink	46.4288
38	Norbert Schneider	46.3905
39	Miklos Levai	46.1482
40	Alexander Zhirkov	46.0960
41	Yves Minet	45.9529
42	Eric Chen	45.8978
43	Borys Jaworski	45.7963
44	Mike Oakes	45.4811
45	Mischa Rodermond	45.2614
46	Paul Vanderveen	45.2394
47	Michael Stocker	45.1413
48	Adrian Bondrescu	45.1328
49	Dario Alpern	44.9364
50	Jorge Coveiro	44.8701
51	Norman Luhn	44.6606
52	Leonid Durman	44.5445
53	Erik Branger	44.5434
54	Jorge Menendez	44.1576
55	Maksym Voznyy	44.0643
56	Phil Moore	43.9356
57	Renaud Lifchitz	43.9182
58	Jinyuan Wang	43.8729
59	Ray Chandler	43.7713
60	Yusuf AttarBashi	43.7152
61	Youcef Lemsafer	43.6970
62	Anatoly F. Selevich	43.6366
63	Danilo Nitsche	43.4553
64	Matthias Wurtinger	43.4236
65	Makoto Kamada	43.3220
66	Syoichiro Yamada	43.3093
67	paolo galliani	43.1908
68	Donovan Johnson	43.1363
69	Eric W. Weisstein	43.1286
70	Aurel Gibier	43.0939
71	Riley Fisher	42.9474
72	Ed Trice	42.9402
73	Mark Rodenkirch	42.9159
74	Vincent Diepeveen	42.9031
75	Martin Hopf	42.7818
76	Robert Smith	42.7237
77	Richard Fischer	42.6759
78	Tom Wu	42.6028
79	Thomas Ritschel	42.5917
80	Robert Kinser	42.5587
81	Alex_soldier	42.5456
82	Jens K. Andersen	42.4271
83	Milton L. Brown	42.4230
84	Gilbert Mozzo	42.3829
85	Luke W. Richards	42.2565
86	Jason Yuen	42.2563
87	Markus Tervooren	42.2013
88	Harrison Mesh	42.1987
89	Hayden Chesnut	42.1843
90	Kevin Acres	42.1267
91	Tyler NeSmith	42.1057
92	Alexander Gramolin	42.0680
93	Andy Steward	42.0678
94	Dmitry Domanov	41.9615
95	David Broadhurst	41.9510
96	Akihiko Yoshida	41.9008
97	Wayne Halsdorf	41.8768
98	Theodore Burton	41.8735
99	Matt Stath	41.8125
100	Kimmo Herranen	41.7829
101	Yaroslav Berezhko	41.7407
102	Karsten Bonath	41.7119
103	Harsh Aggarwal	41.6996
104	Michael Porter	41.6897
105	Nicolas PALAU	41.6474
106	Sujan Das	41.5708
107	Matthias Baur	41.5055
108	Michael Vang	41.5045
109	Joe McLean	41.4510
110	Jason Earls	41.4443
111	Cletus Emmanuel	41.3699
112	Paul Underwood	41.2942
113	Faysal YAtim	41.2683
114	Valeryi Kuryshev	41.2673
115	Gary Barnes	41.2070
116	Dylan Delgado	41.1947
117	Andrey Kulsha	41.1560
118	Payam Samidoost	41.1236
119	Jean Penné	41.0866
120	M. Frind & P. Underwood	41.0735
121	Pedja Terzic	41.0362
122	T. D. Noe	41.0112
123	Robinas Birthday	40.7095
124	Bernardo Boncompagni	40.6902
125	Darren Bedwell	40.5716
126	Alexander Weiss	40.5545
127	H.&R. Lifchitz	40.5526
128	Marek Hubal	40.5299
129	Poliagapitos	40.3648
130	Jiahao He	40.2751
131	Jeppe Stig Nielsen	40.1663
132	Arkadiusz Wesolowski	40.0345
133	Marisa Kirisame	40.0015
134	Jim Fougeron	39.9920
135	Daniel Heuer	39.8964
136	Paul Bourdelais, Harvey Dubner	39.8282
137	Sander Hoogendoorn	39.8108
138	D. Gazzoni Filho & Lucas Teixeira	39.6113
139	Predrag Minovic	39.5972
140	Wojciech Florek	39.5962
141	Ryan C Weaving	39.5308
142	Sinkiti Sibata	39.4834
143	Kurt Beschorner	39.3559
144	Dirk Augustin	39.2949
145	Logan Mesh	39.2542
146	Kenneth Egtved Pedersen	39.1165
147	Lew Baxter	39.1057
148	Tapashree & Jainam	38.8360
149	Harald Ritter	38.8053
150	Patrick Schmeer	38.6236
151	Ananda Tallur & Jean-Louis Charton	38.5718
152	Walter Nissen	38.4704
153	James G. Merickel	38.4559
154	Gary Chaffey	38.4469
155	Thomas Masser	38.4129
156	Décio Gazzoni Filho	38.3716
157	D.Broadhurst and W.Edgington	38.3693
158	Peter Lesala	38.2364
159	Pierre CAMI	38.1880
160	Phil Carmody	38.0649
161	Jiong Sun	38.0187
162	Platon Sovilj	37.8224
163	Bouk de Water	37.7897
164	Kamil Duszenko	37.7572
165	Harvey Dubner	37.7421
166	Paul Leyland	37.7267
167	Connor Deptuck	37.7091
168	Markus Hiltbrunner	37.5011
169	Joel Levy	37.4885
170	Leonardo Ottaviano	37.4341
171	Meng-Hsuan Wu	37.2670
172	Greg Childers	37.2465
173	Raffi Chaglassian	37.1068
174	Marcin Lipinski	37.0378
175	Richard McIntosh	37.0213
176	Rob Binnekamp	36.9534
177	Paul Jobling	36.8410
178	Lewis,Jobling,Nash	36.6013
179	Ken Davis	36.4213
180	Rubén Blanco	36.3081
181	MohamedReda Kebbaj	36.2809
182	D.Broadhurst and N.Mandela	36.2365
183	D.Broadhurst and M.Kamada	36.2230
184	D. Broadhurst & B. de Water	36.2010
185	Steven Harvey	36.0407
186	Alexander Kuzmich	35.8876
187	Paul Schmidt	35.8030
188	Anton Vrba	35.6914
189	Dudley Fox	35.5339
190	William Garnett	35.2932
191	Peter Liaskovsky	35.1846
192	Ray Ballinger	35.1526
193	Dmitry Kamenetsky	34.9327
194	Matthew Peets	34.8243
195	Hugo Platzer	34.7951
196	V.M.Ulyanov	34.7788
197	Leonid Muraviov	34.7753
198	Giovanni Di Maria	34.5567
199	Cyclamen Persicum	34.5441
200	Ed Pegg	34.4014
201	Richard FitzHugh	34.1466
202	Michael Kwok	34.1355
203	Sean A. Irvine	34.0515
204	Ed T. Prothro	33.9358
205	Andy Klingeleers	33.8707
206	Nuutti Kuosa	33.7910
207	Michael Eaton	33.7691
208	Tetsuya Kobayashi	33.6073
209	J. Alm & D. Johnson	33.5636
210	Göran Hemdal	33.2857
211	Hugo Pfoertner	33.2269
212	Giovanni La Barbera	33.1670
213	Polly T. Wang	32.8241
214	Guido Smetrijns	32.7635

^* : See the "Prime Pages" by Chris K. Caldwell for explanations about the production score used.

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Created by Henri Lifchitz & Renaud Lifchitz : October, 26 2000, last modification: January, 18 2026 15:17 (Time in France)

PRP Top - Top discoverers

Top discoverers by number of PRPs

Top discoverers by production score*

Top discoverers by production score^*