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A046268 Largest prime substring in 2^n (0 if none). +0
3
0, 2, 0, 0, 0, 3, 0, 2, 5, 5, 2, 2, 409, 19, 163, 7, 6553, 131, 2621, 5, 857, 971, 419, 83, 1677721, 5443, 71, 1342177, 43, 709, 107, 83, 4294967, 89, 171798691, 3597383, 6871947673, 3743895347, 779069, 54975581, 511627, 99023, 4398046511, 79609 (list; graph; listen)
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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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