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A051342 Smallest prime factor of 1 + (product of first n primes). 8
3, 7, 31, 211, 2311, 59, 19, 347, 317, 331, 200560490131, 181, 61, 167, 953, 73, 277, 223, 54730729297, 1063, 2521, 22093, 265739, 131, 2336993, 960703, 2297, 149, 334507, 5122427, 1543, 1951, 881, 678279959005528882498681487, 87549524399 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Based on Euclid's proof that there are infinitely many primes.

LINKS

Hisanori Mishima, Factorizations of many number sequences

Hisanori Mishima, Factorizations of many number sequences

R. G. Wilson v, Explicit factorizations

CROSSREFS

a(n) = A020639(1+A002110(n)). Cf. A014545, A002585.

Sequence in context: A141385 A059296 A123332 * A002585 A103785 A083772

Adjacent sequences:  A051339 A051340 A051341 * A051343 A051344 A051345

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu)

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Last modified February 17 21:13 EST 2012. Contains 206085 sequences.