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Forum: And now for something completely different 2020-06-03, 18:00
Replies: 47
Views: 20,888
Posted By carpetpool
Post p = 1 mod 4 increases the odds of such a prime,...

p = 1 mod 4 increases the odds of such a prime, as N = 6*p^n+1 is congruent 7 mod 8, but there is still 1/3 chance --- which at 965K digits, I'm not sure if anyone would be willing to test if N |...
Forum: And now for something completely different 2020-05-30, 19:44
Replies: 47
Views: 20,888
Posted By carpetpool
Post There is also this (https://oeis.org/A332763)...

There is also this (https://oeis.org/A332763) possible sequence I am approaching the T5K range for. It would be interesting to find a prime (k=6) making the "Divides Phi" achievable class...
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