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	51
Riesel primes k•2n-1	k-value	3,351
Riesel primes k•bn-1, b>2	base	8
Proth primes k•2n+1	k-value	138
Proth primes k•bn+1, b>2	base	5
Carol-Kynea primes (bn±1)2-2	base	381
Williams primes (b-1)•bn-1	base	169
Williams primes (b-1)•bn+1	base	153
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 n•bn-1	base	73
Near Woodall primes (n-1)•bn-1	base	4
Near Woodall primes (n+1)•bn-1	base	2
Cullen primes n•bn+1	base	32
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

Integer Natural Even Odd Rational Irrational Real Prime Probable prime

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