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Forum: enzocreti 2020-02-25, 10:51
Replies: 5
Views: 1,091
Posted By enzocreti
...

I note that there are pairs (21,22) (42,43) (126,127) (62,63)...(a,b) with either a or b multiple of 7...do you believe these pairs with consecutive a,b are infinite?




I call a(n) the n-th...
Forum: enzocreti 2020-02-25, 10:47
Replies: 5
Views: 1,091
Posted By enzocreti
...

I note that there are pairs (21,22) (42,43) (126,127) with 21,42,126 multiple of 7


Is it unlikely that these consecutive (a,b) are infinitely many?
Forum: enzocreti 2020-02-23, 16:20
Replies: 5
Views: 1,091
Posted By enzocreti
Primes of the form 30*n^2-1

Because I found that the prime 5879 is in some mysterious way involved in pg primes
And realizing that 5879 is a prime of the form 30*n^2-1, I wonder if in oesi there is a sequence of primes of...
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