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A155762 Prime numbers p such that prepending any single decimal digit to p does not produce a prime. 2
2, 5, 149, 401, 509, 773, 809, 1021, 1103, 1289, 1301, 1451, 1697, 1709, 1747, 1877, 1889, 2087, 2389, 2521, 2663, 3373, 3511, 3631, 3733, 3779, 3821, 3919, 3947, 3989, 4003, 4073, 4241, 4289, 4339, 4637, 4643, 4801, 4931, 5039, 5113, 5387, 5417, 5477 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

149 is in the sequence, because the following numbers are all composite: 1149, 2149, 3149, 4149, 5149, 6149, 7149, 8149 and 9149.

LINKS

Table of n, a(n) for n=1..44.

CROSSREFS

Cf. A119289

Sequence in context: A130412 A175525 A069139 * A307480 A062611 A263413

Adjacent sequences:  A155759 A155760 A155761 * A155763 A155764 A155765

KEYWORD

nonn,base

AUTHOR

Dmitry Kamenetsky, Jan 26 2009

STATUS

approved

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Last modified February 26 17:19 EST 2020. Contains 332293 sequences. (Running on oeis4.)