11111*(10^13-1)*(10^2389-1)*(10^155285-1)/242674820198201/(10^65-1)/(10^11945-1)/(10^31057-1) http://factordb.com/index.php?id=1100000005854135057 https://stdkmd.net/nrr/repunit/prpfactors.htm
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