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Difference between revisions of "Woodall prime"
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*[https://harvey563.tripod.com/gwranges.txt Generalized Woodall ranges completed] by [[Steven Harvey]], 2019-03-29 | *[https://harvey563.tripod.com/gwranges.txt Generalized Woodall ranges completed] by [[Steven Harvey]], 2019-03-29 | ||
*[https://harvey563.tripod.com/GeneralizedWoodallPrimes.txt Generalized Woodall primes] by [[Steven Harvey]], 2019-04-15 | *[https://harvey563.tripod.com/GeneralizedWoodallPrimes.txt Generalized Woodall primes] by [[Steven Harvey]], 2019-04-15 | ||
| − | *[https://harvey563.tripod.com/NearGeneralizedWoodall.txt Near Generalized Woodall primes] by [[Steven Harvey]], 2017-08-11 | + | *[https://harvey563.tripod.com/NearCullen_WoodallPrimes.txt Near Cullen & Woodall primes] by [[Steven Harvey]], 2015-04-28 |
| + | *[https://harvey563.tripod.com/NearGeneralizedWoodall.txt Near Generalized Cullen & Woodall primes] by [[Steven Harvey]], 2017-08-11 | ||
*[https://www.mersenneforum.org/showthread.php?t=28553 Current reservation/status: 2023-04-01 to (ongoing)] at [[MersenneForum]] | *[https://www.mersenneforum.org/showthread.php?t=28553 Current reservation/status: 2023-04-01 to (ongoing)] at [[MersenneForum]] | ||
*[https://www.mersenneforum.org/showthread.php?t=28531 Generalized Cullens/Woodalls: 2023-03-13 to 2023-04-03] at [[MersenneForum]] | *[https://www.mersenneforum.org/showthread.php?t=28531 Generalized Cullens/Woodalls: 2023-03-13 to 2023-04-03] at [[MersenneForum]] | ||
Latest revision as of 00:04, 15 January 2025
Contents
[hide]Definitions
A Woodall prime is a Woodall number (n•2n-1), which is prime.
A Generalized Woodall prime could be defined as a Woodall prime with a general base b > 2, so of the form n•bn-1. The restriction of n+2 > b should then be claimed, otherwise every prime could be called a "Generalized Woodall prime".
A Near Generalized Woodall prime is defined as (n-1)•bn-1 or (n+1)•bn-1.
Note
For a complete list in this Wiki the primes of the forms n•bn-1 are given with b ≥ 2, n ≥ 1 and listed as "Gen Woodall primes".
See also
- original Woodall primes list
- Table with all available bases
External links
- Woodall number
- Woodall number
- Top 20 Generalized Woodall primes
- Generalized Woodall status reports by Steven Harvey, 2019-04-13
- Generalized Woodall ranges completed by Steven Harvey, 2019-03-29
- Generalized Woodall primes by Steven Harvey, 2019-04-15
- Near Cullen & Woodall primes by Steven Harvey, 2015-04-28
- Near Generalized Cullen & Woodall primes by Steven Harvey, 2017-08-11
- Current reservation/status: 2023-04-01 to (ongoing) at MersenneForum
- Generalized Cullens/Woodalls: 2023-03-13 to 2023-04-03 at MersenneForum
- Some new Generalized Cullen and Woodall primes: 2019-09-02 to 2019-11-27 at MersenneForum
- Generalized Cullen/Woodall Sieving Software: 2014-11-05 to 2014-12-29 at MersenneForum
- Generalized Cullen and Woodall Searches: 2014-09-21 to 2022-02-12 at MersenneForum
