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A110718
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Beginning with 7, concatenation of n successive numbers such that every partial concatenation is a prime.
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3
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7, 1011, 123, 30313233, 127128129130131, 363738394041, 78910111213, 11661167116811691170117111721173, 251252253254255256257258259, 168169170171172173174175176177, 439440441442443444445446447448449
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| 7,71011,71011123,... are all prime.
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CROSSREFS
| Cf. A110714, A110715, A110716, A110717, A110719.
Sequence in context: A201070 A173852 A062841 * A013544 A004807 A139781
Adjacent sequences: A110715 A110716 A110717 * A110719 A110720 A110721
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KEYWORD
| base,hard,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 05 2005
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EXTENSIONS
| More terms from Jon E. Schoenfield (jonscho(AT)hiwaay.net), Jul 11 2010
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