- **Twin Prime Search**
(*https://www.mersenneforum.org/forumdisplay.php?f=65*)

- - **List of variable-n primes found**
(*https://www.mersenneforum.org/showthread.php?t=13831*)

[QUOTE=mdettweiler;259573]Note that ever since we upgraded the PRPnet server to version 4.1.4, it has clients check the +1's automatically (and stores the residuals in the server results files, available from [URL]http://www.noprimeleftbehind.net/tps/[/URL]). Of course, you may still want to do a doublecheck, but the initial check is automatically taken care of (generally on the same client machine that found the original -1 prime).[/QUOTE]
Ok I did a check anyway :) 173943*2^480166+1 is not prime. Proth RES64: 08559155C6E8CABD Time : 371.504 sec. 179025*2^480578+1 is not prime. Proth RES64: 1F4BCFCFE5B43B85 Time : 370.618 sec. 115095*2^480748+1 is not prime. Proth RES64: 0A925998113E43DB Time : 307.396 sec. 112983*2^480882+1 is not prime. Proth RES64: 90E8491411FE7161 Time : 308.301 sec. 146649*2^480989+1 is not prime. Proth RES64: 7408B6508FC388FE Time : 371.729 sec. 182379*2^481201+1 is not prime. Proth RES64: FB973052CB71AFAC Time : 371.908 sec. 158655*2^481257+1 is not prime. Proth RES64: 7DC37505FCBBD669 Time : 371.069 sec. 101085*2^483510+1 is not prime. Proth RES64: 6C1364E77C24175C Time : 310.906 sec. 117711*2^483635+1 is not prime. Proth RES64: 0FFED8CAE0BD7500 Time : 310.842 sec. 103077*2^483810+1 is not prime. Proth RES64: BA7164860CCC5DF5 Time : 312.482 sec. 182523*2^483936+1 is not prime. Proth RES64: 047FF2FC723D0874 Time : 374.465 sec. Lennart |

[QUOTE=Lennart;246692]52125*2^482492+1 is not prime. Proth RES64: 8C4879C6B5A03FA8 Time : 367.205 sec.
[B]78081*2^482529+1[/B] is not prime. Proth RES64: DCFEF34DD8DF516F Time : 365.880 sec. [B]78081*2^482529+1[/B] is Prime! Lennart[/QUOTE] all I know about this topic is k*2^n[TEX]\pm[/TEX] 1 only seems to be possible twin when k mod 3=0 . the bolded seems impossible once with it not prime the next with it prime. |

[QUOTE=science_man_88;259671]all I know about this topic is k*2^n[TEX]\pm[/TEX] 1 only seems to be possible twin when k mod 3=0 . the bolded seems impossible once with it not prime the next with it prime.[/QUOTE]
See post #33. Lennart corrected it there. |

178107*2^481694-1 is Prime
173985*2^481857-1 is Prime Lennart |

182505*2^482066-1 is Prime
198045*2^482129-1 is Prime 111573*2^482160-1 is Prime 110295*2^482405-1 is Prime 110439*2^482447-1 is Prime 150591*2^482527-1 is Prime 167877*2^482568-1 is Prime 170049*2^482689-1 is Prime 101055*2^482696-1 is Prime 123807*2^482808-1 is Prime 140925*2^482839-1 is Prime Lennart |

odicin found the following prime a while back while Oddball was on vacation:
user=odicin [2011-08-07 01:07:46] 139023*2^485174-1 is prime! Time : 0.0 sec. user=odicin [2011-08-07 01:07:46] 139023*2^485174+1 is not prime. Res64: 65644C7379D517CF Time : 0.0 sec. |

[QUOTE=mdettweiler;270564]odicin found the following prime a while back while Oddball was on vacation:
user=odicin [2011-08-07 01:07:46] 139023*2^485174-1 is prime! Time : 0.0 sec. user=odicin [2011-08-07 01:07:46] 139023*2^485174+1 is not prime. Res64: 65644C7379D517CF Time : 0.0 sec.[/QUOTE] It's on the list now. We'll need two more primes to get to 100 primes found :smile: |

By celebratory of two new primes found (and the hundreds overeall on this server), I'm now registered here in the forum :smile:
[2011-09-13 12:54:34] 144747*2^485360-1 is prime! Time : 0.0 sec. 144747*2^485360+1 is neither PRP nor prime [2011-09-14 00:19:41] 159159*2^485373-1 is prime! Time : 0.0 sec. 159159*2^485373+1 is neither PRP nor prime Regards Odi |

[FONT=Arial, Helvetica, sans serif]144183*2^486398-1 is prime
-- Lumiukko [/FONT] |

[2011-09-16 13:09]
116355*2^485485-1 is prime! Time : 0.0 sec. 116355*2^485485+1 is neither PRP nor prime [2011-09-18 03:48] 161691*2^486091-1 is prime! Time : 0.0 sec. 161691*2^486091+1 is neither PRP nor prime [2011-09-18 05:04] 149085*2^486161-1 is prime! Time : 0.0 sec. 149085*2^486161+1 is neither PRP nor prime [2011-09-18 07:34] 134949*2^486309-1 is prime! Time : 0.0 sec. 134949*2^486309+1 is neither PRP nor prime Odi |

113175*2^486067-1
138891*2^486095-1 180411*2^486159-1 150849*2^486587-1 179085*2^486798-1 155145*2^486858-1 [SIZE=7]Is Prime :)[/SIZE] |

All times are UTC. The time now is 19:57. |

Powered by vBulletin® Version 3.8.11

Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.