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A046271 Largest prime substring in 5^n (0 if none). 2
0, 5, 5, 5, 5, 31, 5, 7, 5, 19531, 97, 281, 2441, 12207031, 103, 305175781, 58789, 94531, 3814697, 63281, 95367431, 6837158203, 5791, 9209289550781, 60464477539, 953, 901161193, 450580596923, 2529029846191 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..28.

CROSSREFS

Cf. A046263.

Sequence in context: A282209 A082476 A024729 * A283076 A046263 A092279

Adjacent sequences:  A046268 A046269 A046270 * A046272 A046273 A046274

KEYWORD

nonn

AUTHOR

Patrick De Geest, Jun 15 1998

STATUS

approved

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Last modified January 17 20:36 EST 2020. Contains 330987 sequences. (Running on oeis4.)