Near Woodall primes of the form (n±1)•2n-1

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Definition

History

Table

No. n Digits Number Normalized form Discoverer Date
1 1 1 2•21-1 22-1 n.n. n.n.
2 2 2 3•22-1 3•22-1 n.n. n.n.
3 3 2 4•23-1 25-1 n.n. n.n.
4 4 2 5•24-1 5•24-1 n.n. n.n.
5 5 3 6•25-1 3•26-1 n.n. n.n.
6 9 4 10•29-1 5•210-1 n.n. n.n.
7 14 6 15•214-1 15•214-1 n.n. n.n.
8 15 6 16•215-1 219-1 n.n. n.n.
9 16 7 17•216-1 17•216-1 n.n. n.n.
10 27 10 28•227-1 7•229-1 n.n. n.n.
11 45 16 46•245-1 23•246-1 n.n. n.n.
12 122 39 123•2122-1 123•2122-1 n.n. n.n.
13 125 40 126•2125-1 63•2126-1 n.n. n.n.
14 213 67 214•2213-1 107•2214-1 n.n. n.n.
15 242 76 243•2242-1 243•2242-1 n.n. n.n.
16 256 80 257•2256-1 257•2256-1 n.n. n.n.
17 263 82 264•2263-1 33•2266-1 n.n. n.n.
18 290 90 291•2290-1 291•2290-1 n.n. n.n.
19 855 261 856•2855-1 107•2858-1 n.n. n.n.
20 1059 322 1060•21059-1 265•21061-1 n.n. n.n.
21 2273 688 2274•22273-1 1137•22274-1 n.n. n.n.
22 3945 1192 3946•23945-1 1973•23946-1 n.n. n.n.
23 3999 1208 4000•23999-1 125•24004-1 n.n. n.n.
24 9512 2868 9513•29512-1 9513•29512-1 Henry Lifchitz 1998-07-03
25 14127 4257 14128•214127-1 883•214131-1 Henry Lifchitz 1998-07-03
26 16486 4967 16487•216486-1 16487•216486-1 Henry Lifchitz 1998-07-03
27 20056 6042 20057•220056-1 20057•220056-1 Henry Lifchitz 1998-07-03
28 28834 8685 28835•228834-1 28835•228834-1 Henry Lifchitz 1998-07-03
29 41493 12496 41494•241493-1 20747•241494-1 Henry Lifchitz 1998-07-03
30 159147 47914 159148•2159147-1 39787•2159149-1 Ray Ballinger 2000-05-19
31 227139 68382 227140•2227139-1 56785•2227141-1 Ray Ballinger 2000-07-28
32 587823 176959 587824•2587823-1 36739•2587827-1 Steven Harvey 2009-09-11

See also

External links