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