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A152598 Records in A001917. 3
1, 2, 6, 8, 18, 24, 31, 38, 72, 105, 129, 630, 1285, 1542, 2048, 3112, 3512, 7710, 7760, 9728, 27594, 48834, 60787, 104694, 140896, 282224, 384800, 683720, 1205998, 1240672, 1407592, 4012472, 4429250, 4628480, 16657248, 69273666, 107700228 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..37.

EXAMPLE

First few terms of A001917 are 1, 1, 2, 1, 1, 2, 1, 2, 1, 6, so a(1) to a(3) are 1, 2, 6.

PROG

(MAGMA) R:=[]; r:=0; for n in [2..100000] do p:=NthPrime(n); a:=(p-1)/Modorder(2, p); if r lt a then r:=a; Append(~R, a); end if; end for; print R;

CROSSREFS

Cf. A001917 ((p-1)/x, where p = prime(n) and x = smallest positive integer such that 2^x == 1 mod p), A152597 (where records occur in A001917).

Sequence in context: A259026 A178758 A024431 * A154610 A053658 A032393

Adjacent sequences:  A152595 A152596 A152597 * A152599 A152600 A152601

KEYWORD

nonn,more

AUTHOR

Klaus Brockhaus, Dec 09 2008

EXTENSIONS

More terms from Vassilis Papadimitriou, Mar 06 2010

More terms from Vassilis Papadimitriou, Mar 19 2010

a(37) from Amiram Eldar, Mar 08 2019

STATUS

approved

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Last modified September 22 03:54 EDT 2020. Contains 337289 sequences. (Running on oeis4.)