

A199428


Extreme weakly prime numbers.


1



40144044691, 58058453543, 89797181359, 185113489357, 213022025663, 222498988079, 365115312521, 397195264507, 507086259359, 537598896647, 576872778883, 671770400281, 710587610861, 719174481061, 815380174991, 840202011349, 855194972407, 869287849361, 891600776149
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OFFSET

1,1


COMMENTS

Primes that become composite if any digit is removed, changed, or inserted anywhere. First & smallest term found by Jens K. Andersen in 2008; five more by Giovanni Resta in Nov. 2011. Expected infinite of them. These primes emerge in relation to the primeversion of classical Doublets puzzle by Lewis Carrol. Correspond to the "aloof" words as named by Donald Knuth.


LINKS

Giovanni Resta, Table of n, a(n) for n = 1..50
G. L. Honaker, Jr. and C. K. Caldwell, Prime Curios! 40144044691
C. Rivera, The prime puzzles & problems connection, puzzle 612
Wikipedia, Word ladder


CROSSREFS

Cf. A050249.
Sequence in context: A216018 A256842 A225886 * A287261 A172631 A172721
Adjacent sequences: A199425 A199426 A199427 * A199429 A199430 A199431


KEYWORD

nonn,base


AUTHOR

Carlos Rivera, Nov 06 2011


EXTENSIONS

More terms from Giovanni Resta, Aug 15 2019


STATUS

approved



