Currently there may be errors shown on top of a page, because of a missing Wiki update (PHP version and extension DPL3).
 Topics Register • News • History • How to • Sequences statistics • Template prototypes

# Statistics

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

## Countings: Sequences per type

Sequences (per base, k-value or individual number) with own page in this Wiki:

Sequence Type counting
Mersenne primes number 51
Riesel primes k•2n-1 k-value 3,397
Riesel primes kbn-1, b>2 base 11
Proth primes k•2n+1 k-value 152
Proth primes kbn+1, b>2 base 6
Carol-Kynea primes (bn±1)2-2 base 382
Williams primes (b-1)bn-1 base 169
Williams primes (b-1)bn+1 base 154
Williams primes (b+1)bn-1 base 87
Williams primes (b+1)bn+1 base 82
Leyland numbers xy+yx number 1,814
Leyland numbers xy-yx number 1
Woodall primes nbn-1 base 775
Near Woodall primes (n-1)bn-1 base 4
Near Woodall primes (n+1)bn-1 base 2
Cullen primes nbn+1 base 139
Near Cullen primes (n-1)bn+1 base 1
Near Cullen primes (n+1)bn+1 base 1
Fermat numbers F(2) number 150
GF Divisors (2) number 184
Gen.Fermat numbers xGF(3) number 21
GF Divisors (3) number 202
Gen.Fermat numbers xGF(4) number 4
GF Divisors (4) number 62
Gen.Fermat numbers xGF(5) number 15
GF Divisors (5) number 363
Gen.Fermat numbers xGF(6) number 11
GF Divisors (6) number 148
Gen.Fermat numbers xGF(7) number 26
GF Divisors (7) number 439
Gen.Fermat numbers xGF(8) number 23
GF Divisors (8) number 364
Gen.Fermat numbers xGF(9) number 17
GF Divisors (9) number 348
Gen.Fermat numbers xGF(10) number 18
GF Divisors (10) number 275
Gen.Fermat numbers xGF(11) number 45
GF Divisors (11) number 743
Gen.Fermat numbers xGF(12) number 14
GF Divisors (12) number 309
all GF Divisors number 1158
Number classes
 General numbers
 Special numbers Mersenne 2n-1 Fermat 22n+1 Proth k•2n+1 Riesel k•2n-1 Woodall n•2n-1 Cullen n•2n+1 Double Mersenne 22p-1-1 Perfect 2n-1(2n-1) Leyland xy ± yx
 Prime numbers Mersenne Proth Riesel Williams (b±1)bn±1 Carol/Kynea (bn±1)2-2 Multifactorial n!j±1