Thread: 69660 and 92020
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Old 2020-01-24, 15:31   #3
enzocreti
 
Mar 2018

20F16 Posts
Default 215 , 51456, 69660, 92020, 541456

51456, 69660, 92020, 541456 are even and congruent to 10^n mod 41


pg(51456), pg(69660), pg(92020) and pg(541456) are prp


51456, 69660, 92020, 541456 are all congruent to 7*2^q-1 mod 13 with q a nonnegative integer




215 is odd and pg(215) is prp


215 is congruent to 7*2^q mod 13
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