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A068830
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Smallest member of the first occurrence of exactly n consecutive primes with all odd digits.
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2
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97, 31, 71, 191, 311, 53717, 3, 1137911, 3539995913, 379537751, 195513511313, 355993373513, 35795175733111, 139351331937113, 573737391997313
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| a(16) > (10^16-1)/9. a(17) = 197351535173531. a(n) > (10^16-1)/9 for n >= 18. [From Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 21 2010]
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EXAMPLE
| a(2) = 31, the two primes are 31 and 37. a(7) = 3 and the primes are 3,5,7,11,13,17 and 19.
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CROSSREFS
| Cf. A068831, A068832.
Sequence in context: A106429 A126840 A094498 * A033417 A182690 A088866
Adjacent sequences: A068827 A068828 A068829 * A068831 A068832 A068833
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KEYWORD
| hard,more,nonn,base
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 09 2002
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EXTENSIONS
| 1137911 from Larry Reeves (larryr(AT)acm.org), Oct 09 2003
a(9)-a(11) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Apr 03 2008
a(12)-a(15) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 21 2010
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