# V(43987)/175949

At this site we maintain a list of the 5000 Largest Known Primes which is updated hourly. This list is the most important PrimePages database: a collection of research, records and results all about prime numbers. This page summarizes our information about one of these primes.

Description: | V(43987)/175949 |
---|---|

Verification status (*): | PRP |

Official Comment (*): | Lucas cofactor, ECPP |

Proof-code(s): (*): | c8 : Broadhurst, Water, Primo |

Decimal Digits: | 9188 (log_{10} is 9187.4939448729) |

Rank (*): | 78503 (digit rank is 2) |

Entrance Rank (*): | 67984 |

Currently on list? (*): | short |

Submitted: | 5/31/2014 12:04:34 CDT |

Last modified: | 5/31/2014 13:21:20 CDT |

Database id: | 117941 |

Status Flags: | Verify, TrialDiv |

Score (*): | 32.1774 (normalized score 0) |

#### Archival tags:

There are certain forms classed as archivable: these prime may (at times) remain on this list even if they do not make the Top 5000 proper. Such primes are tracked with archival tags.

- Elliptic Curve Primality Proof (archivable *)
- Prime on list:
no, rank238

Subcategory: "ECPP"

(archival tag id 217715, tag last modified 2021-09-18 09:37:41)- Lucas cofactor (archivable *)
- Prime on list:
yes, rank14

Subcategory: "Lucas cofactor"

(archival tag id 217716, tag last modified 2020-09-11 12:20:26)

#### Verification data:

The Top 5000 Primes is a list for proven primes only. In order to maintain the integrity of this list, we seek to verify the primality of all submissions. We are currently unable to check all proofs (ECPP, KP, ...), but we will at least trial divide and PRP check every entry before it is included in the list.

field value prime_id 117941 person_id 9 machine Ditto P4 P4 what prp notes Command: /home/ditto/client/pfgw -tc -q"V(43987)/175949" 2>&1 PFGW Version 3.4.5.32BIT.20110215.x86_Dev [GWNUM 26.5] Primality testing V(43987)/175949 [N-1/N+1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 3 Running N-1 test using base 11 Running N+1 test using discriminant 17, base 2+sqrt(17) Calling N-1 BLS with factored part 0.11% and helper 0.02% (0.35% proof) V(43987)/175949 is Fermat and Lucas PRP! (38.4188s+0.0036s) [Elapsed time: 38.00 seconds] modified 2020-07-07 17:30:17 created 2014-05-31 13:01:22 id 163491

Query times: 0.0005 seconds to select prime, 0.0011 seconds to seek comments.

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