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A062573
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Numbers n such that k^n - (k-1)^n is prime, where k is 7.
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2
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2, 3, 7, 29, 41, 67, 1327, 1399, 2027, 69371, 86689, 355039
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Terms > 1000 are often only strong pseudo-primes.
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LINKS
| Henri & Renaud Lifchitz, Top probable primes of the form 7^p-6^p
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CROSSREFS
| Cf. A000043, A057468, A059801, A059802, A062572-A062666.
Sequence in context: A052877 A137075 A060412 * A019435 A061092 A084435
Adjacent sequences: A062570 A062571 A062572 * A062574 A062575 A062576
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KEYWORD
| nonn,hard
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AUTHOR
| Mike Oakes (Mikeoakes2(AT)aol.com), May 18 2001, May 19 2001
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EXTENSIONS
| Two more terms (69371 and 86689) found by Predrag Minovic in 2004 corresponding to probable primes with 58626 and 73261 digits. Jean-Louis Charton (chartonjl(AT)wanadoo.fr), Oct 06 2010
New term 355039 found by Jean-Louis Charton in May 2011 corresponding to a probable prime with 300043 digits.
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