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A023107
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Largest integer in which every prefix is prime in base n (written in base 10).
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3
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71, 191, 2437, 108863, 6841, 4497359, 1355840309, 73939133, 6774006887, 18704078369, 122311273757, 6525460043032393259, 927920056668659, 16778492037124607, 4928397730238375565449, 5228233855704101657, 3013357583408354653, 1437849529085279949589, 101721177350595997080671, 185720479816277907890970001
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,1
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COMMENTS
| Or, largest right-truncatable prime with base n>2 (in decimal form).
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REFERENCES
| Angell, I. O. and Godwin, H. J. "On Truncatable Primes." Math. Comput. 31, 265-267, 1977.
Angell, I. O.; Godwin, H. J.: On Truncatable Primes. In: Mathematics of Computation 31 (1977), nr. 137, p. 265-267.
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LINKS
| Martin Renner, Table of n, a(n) for n = 3..53
Index entries for sequences related to truncatable primes
Eric Weisstein. "Truncatable Prime.".
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CROSSREFS
| Cf. A076586.
Sequence in context: A142612 A139991 A140007 * A174370 A174454 A142808
Adjacent sequences: A023104 A023105 A023106 * A023108 A023109 A023110
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KEYWORD
| nonn,base
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AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
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EXTENSIONS
| More terms from Don Reble, Jun 23 2004
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