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A294133
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Sorted list of prime factors of numbers of the form 5^(2^m) + 2^(2^m) with m >= 0.
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5
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7, 17, 29, 97, 193, 257, 641, 12289, 22993, 65537, 102593, 115201, 152833, 211457, 993793, 5189633, 26411009, 79280897, 93847553, 167772161, 230686721, 1364951041, 1573071713, 3221225473, 5488091137, 186678460417, 206158430209, 274568286337
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OFFSET
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1,1
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COMMENTS
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Primes p other than 3 such that the multiplicative order of 5/2 (mod p) is a power of 2.
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LINKS
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PROG
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(PARI) print1(7, ", "); forprime(p=17, 274568286337, z=znorder(Mod(5/2, p)); if(2^ispower(z)==z, print1(p, ", ")));
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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