A super-Poulet number is a Poulet number whose every divisor d divides
- 2d − 2.
For example 341 is a super-Poulet number: it has positive divisors {1, 11, 31, 341} and we have:
- (211 - 2) / 11 = 2046 / 11 = 186
- (231 - 2) / 31 = 2147483646 / 31 = 69273666
- (2341 - 2) / 341 = 13136332798696798888899954724741608669335164206654835981818117894215788100763407304286671514789484550
The super-Poulet numbers below 10,000 are (sequence A050217 in OEIS):
n | |
---|---|
1 | 341 = 11 × 31 |
2 | 1387 = 19 × 73 |
3 | 2047 = 23 × 89 |
4 | 2701 = 37 × 73 |
5 | 3277 = 29 × 113 |
6 | 4033 = 37 × 109 |
7 | 4369 = 17 × 257 |
8 | 4681 = 31 × 151 |
9 | 5461 = 43 × 127 |
10 | 7957 = 73 × 109 |
11 | 8321 = 53 × 157 |
Read more about Super-Poulet Number: Super-Poulet Numbers With 3 or More Distinct Prime Divisors
Famous quotes containing the word number:
“Coles Hill was the scene of the secret night burials of those who died during the first year of the settlement. Corn was planted over their graves so that the Indians should not know how many of their number had perished.”
—For the State of Massachusetts, U.S. public relief program (1935-1943)