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A367195
Primes p such that (2^(p-1)*(p+1) - 1) / p is prime.
0
3, 5, 7, 11, 19, 29, 41, 61, 137, 181, 293, 11171
OFFSET
1,1
COMMENTS
2^(p-1)*(p+1) - 1 is the p-th term of the Cunningham chain p = n_1, n_2, ..., where n_{i+1} = 2*n_i+1 for i >= 1.
CROSSREFS
Sequence in context: A093442 A364920 A155008 * A175196 A077858 A327461
KEYWORD
nonn,more
AUTHOR
M. Farrokhi D. G., Nov 09 2023
EXTENSIONS
a(12) from Michael S. Branicky, Nov 09 2023
STATUS
approved