|
Search: id:A059802
|
|
|
| A059802 |
|
Numbers n such that 5^n - 4^n is prime. |
|
+0
107
|
|
| 3, 43, 59, 191, 223, 349, 563, 709, 743, 1663, 5471, 17707, 19609, 35449, 36697, 45259, 91493
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Some of the larger entries may only correspond to probable primes.
5^1663 - 4^1663, a 1163-digit number, has been certified prime with Primo. - Rick L. Shepherd (rshepherd2(AT)hotmail.com), Nov 13 2002
4 more terms found by Predrag Minovic in 2004: 35449, 36697, 45259, 91493. Corresponding numbers of decimal digits are 24778, 25651, 31635, 63951. - Alexander Adamchuk (alex(AT)kolmogorov.com), Dec 02 2006
|
|
CROSSREFS
|
Cf. A000043, A057468, A059801, etc.
Adjacent sequences: A059799 A059800 A059801 this_sequence A059803 A059804 A059805
Sequence in context: A083402 A058808 A137192 this_sequence A006033 A002551 A127930
|
|
KEYWORD
|
nonn,hard
|
|
AUTHOR
|
Mike Oakes (Mikeoakes2(AT)aol.com), Feb 23 2001
|
|
|
Search completed in 0.002 seconds
|
