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PW:Statistics
Countings: Sequences per type
Sequences (per base, k-value or individual number) with own page in this Wiki:
| Sequence | Type | counting |
|---|---|---|
| Mersenne primes | number | 52 |
| Riesel primes k•2n-1 | k-value | 0 |
| Gen Riesel primes k•bn-1 | base | 0 |
| Proth primes k•2n+1 | k-value | 0 |
| Gen. Proth primes k•bn+1 | base | 0 |
| Carol-Kynea primes (bn±1)2-2 | base | 382 |
| Williams primes (b-1)•bn-1 | base | 214 |
| Williams primes (b-1)•bn+1 | base | 189 |
| Williams primes (b+1)•bn-1 | base | 128 |
| Williams primes (b+1)•bn+1 | base | 110 |
| Leyland numbers xy+yx | number | 1,814 |
| Leyland numbers xy-yx | number | 1 |
| Gen Woodall primes n•bn-1 | base | -2 |
| Near Gen Woodall primes (n-1)•bn-1 | base | -1 |
| Near Gen Woodall primes (n+1)•bn-1 | base | -1 |
| Gen Cullen primes n•bn+1 | base | -2 |
Number classes
| General numbers |
| Special numbers |
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| Prime numbers |
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