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A082952 Smaller of the two factors of the n-th semiprime number of the form m!+1. 3
5, 11, 7, 71, 61, 11, 83, 23, 71, 20639383, 811, 401, 1697, 29, 67411, 14029308060317546154181, 12893, 12318573951317236818169524329, 79, 16567, 6653, 293, 229758023927584562777368125832724248866067995638905559798117 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..23.

Paul Leyland, Tables of factors of N!+1 and N!-1.

Hisanori Mishima, n! + 1 (n = 1 to 100).

FORMULA

Numbers p such that p*q=A078778(n)!+1, p, q prime, p<q

EXAMPLE

a(3)=7 because A078778(3)!+1=6!+1=721=7*103

CROSSREFS

Cf. A046315, A078778, A002981, A080802.

Sequence in context: A068419 A226586 A290195 * A113964 A075261 A254766

Adjacent sequences:  A082949 A082950 A082951 * A082953 A082954 A082955

KEYWORD

nonn

AUTHOR

Hugo Pfoertner, May 26 2003

STATUS

approved

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Last modified October 22 05:29 EDT 2019. Contains 328315 sequences. (Running on oeis4.)