禣猧计緇
碝т计筁祘琌羮エт计或妓氮琌рウだ秆
だ秆计獽玻ネ緇 (Cofactor)硂ぃ阶宾此计 (Mersenne Number) 禣皑计 (Fermat Number) ┪瞷ざ残禣猧计 (Fibonacci Number) いΤ﹚╯基
┮孔禣猧计獽琌パそΑ玻ネ计
F1 = F2 = 1Fn+2 = Fn+1 + Fn (ㄤい n = 1,2,3,...)
и Fn 琌 Fnm
だ秆禣猧计の讽い禣猧緇 (Fibonacci Cofactor)
n | 禣猧计 Fn | 禣猧緇 |
6 | 8 | 23 |
8 | 21 | 3 X 7 |
9 | 34 | 2 X 17 |
10 | 55 | 5 X 11 |
12 | 144 | 22 X 32 |
14 | 377 | 13 X 29 |
15 | 610 | 2 X 5 X 61 |
16 | 987 | 3 X 7 X 47 |
18 | 2584 | 23 X 17 X 19 |
19 | 4181 | 37 X 113 |
爹︹禣猧緇堵︹禣猧计┪瞷緇
把σゅ膍の呼
Caldwell, C. K. "The Top Twenty: Fibonacci Cofactor." http://primes.utm.edu/top20/page.php?id=64.