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A108329 Integers n such that 10^n-27 is prime. +0
3
2, 4, 7, 14, 20, 22, 29, 31, 40, 80, 85, 224, 767, 952, 3592, 4016, 4187 (list; graph; listen)
OFFSET

1,1

COMMENT

Some of the larger entries may only correspond to probable primes.

EXAMPLE

n = 7 is a member because: 10^7-27 = 10000000-27 = 9999973, which is prime.

CROSSREFS

Cf. A089675, A095714, A092767.

Sequence in context: A018476 A133638 A018505 this_sequence A057264 A045514 A102957

Adjacent sequences: A108326 A108327 A108328 this_sequence A108330 A108331 A108332

KEYWORD

hard,more,nonn

AUTHOR

Julien Peter Benney (jpbenney(AT)ftml.net), Jun 30 2005

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.


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