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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 2 1 1•22-1 22-1[1] n.n. n.n.
2 4 2 3•24-1 3•24-1 n.n. n.n.
3 5 3 4•25-1 27-1[2] n.n. n.n.
4 11 5 10•211-1 5•212-1[3] n.n. n.n.
5 28 10 27•228-1 27•228-1 n.n. n.n.
6 35 13 34•235-1 17•236-1[4] n.n. n.n.
7 235 74 234•2235-1 117•2236-1[5] n.n. n.n.
8 325 101 324•2325-1 81•2327-1[6] n.n. n.n.
9 551 169 550•2551-1 275•2552-1[7] n.n. n.n.
10 688 210 687•2688-1 687•2688-1 n.n. n.n.
11 7037 2123 7036•27037-1 1759•27039-1[8] n.n. n.n.
12 8896 2682 8895•28896-1 8895•28896-1 n.n. n.n.
13 10020 3021 10019•210020-1 10019•210020-1 Mike Oakes n.n.
14 13597 4098 13596•213597-1 3399•215399-1[9] Mike Oakes n.n.
15 21347 6431 21346•221347-1 10673•221348-1[10] Henry Lifchitz 1998-07-03
16 118020 35533 118019•2118020-1 118019•2118020-1 Steven Harvey 2002-06-27
17 446694 134474 446693•2446694-1 446693•2446694-1 Steven Harvey 2008-09-25
18 659153 198431 659152•2659153-1 41197•2659157-1[11] Steven Harvey 2010-02-01
19 665128 200230 665127•2665128-1 665127•2665128-1 Steven Harvey 2010-02-09
20 790693 238029 790692•2790693-1 197673•2790695-1[12] Steven Harvey 2010-11-17
21 1165667 350907 1165666•21165667-1 582833•21165668-1[13] Steven Harvey 2012-11-14
22 1172171 352865 1172170•21172171-1 586085•21172172-1[14] Steven Harvey 2012-10-03
23 1817933 547259 1817932•21817933-1 454483•21817935-1[15] Steven Harvey 2014-07-29

Notes

See also

External links