Found with PFGW Version 3.6.0

74^28842+73 is 2-PRP! (41.4966s+0.0031s)
74^28842+73 is 3-PRP! (40.9924s+0.0052s)
74^28842+73 is 5-PRP! (41.0726s+0.0048s)
74^28842+73 is 7-PRP! (41.0027s+0.0034s)
74^28842+73 is 11-PRP! (41.0380s+0.0031s)

Primality testing 74^28842+73 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 17, base 14+sqrt(17)
Calling N-1 BLS with factored part 0.03% and helper 0.03% (0.11% proof)
74^28842+73 is Fermat and Lucas PRP! (306.5532s+0.0043s)

To be completed...