A058910 Smallest prime number, not already in sequence, such that the product M of it and all prior numbers in sequence satisfies 2^(M+1) = 1 (mod M).

3, 5, 17, 257, 641, 1217, 14593, 167809, 671233, 1314497, 180449537, 424050817

Offset

1,1

Links

Table of n, a(n) for n=1..12.

Example

a(3)=17 because n=3*5*17=255 and 2^256 = 1 (mod 255)

Crossrefs

Sequence in context: A273870 A272060 A333873 * A307843 A023394 A176689

Adjacent sequences: A058907 A058908 A058909 * A058911 A058912 A058913

Keyword

nonn

Author

Joe K. Crump (joecr(AT)carolina.rr.com), Jan 09 2001

Extensions

Offset corrected by Charles R Greathouse IV, Mar 02 2013

Status

approved