# 177482 · 117^{177482} + 1

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: | 177482 · 117^{177482} + 1 |
---|---|

Verification status (*): | Proven |

Official Comment (*): | Generalized Cullen |

Proof-code(s): (*): | g407 : HermleGC, MultiSieve, PRP, Proth.exe |

Decimal Digits: | 367072 (log_{10} is 367071.01226875) |

Rank (*): | 12837 (digit rank is 1) |

Entrance Rank (*): | 132 |

Currently on list? (*): | short |

Submitted: | 2/3/2008 09:04:13 CDT |

Last modified: | 2/3/2008 15:28:08 CDT |

Database id: | 83932 |

Status Flags: | none |

Score (*): | 43.5555 (normalized score 0.4872) |

#### 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.

- Generalized Cullen (archivable *)
- Prime on list:
yes, rank20

Subcategory: "Generalized Cullen"

(archival tag id 187089, tag last modified 2019-09-04 15:50:26)

#### 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 83932 person_id 9 machine Ditto P4 P4 what prime notes Command: /home/ditto/client/pfgw -t -q"177482*117^177482+1" 2>&1 PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4] Primality testing 177482*117^177482+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 2 Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(163840,20) to FFT(163840,19) Reduced from FFT(163840,19) to FFT(163840,18) Reduced from FFT(163840,18) to FFT(163840,17) Reduced from FFT(163840,17) to FFT(163840,16) 2438776 bit request FFT size=(163840,16) Calling Brillhart-Lehmer-Selfridge with factored part 53.86% 177482*117^177482+1 is prime! (22530.8592s+0.0888s) [Elapsed time: 6.26 hours] modified 2020-07-07 17:30:40 created 2008-02-03 09:12:37 id 96993

field value prime_id 83932 person_id 9 machine RedHat P4 P4 what trial_divided notes Command: /home/caldwell/client/TrialDiv/TrialDiv -q 177482 117 177482 1 2>&1 [Elapsed time: 9.456 seconds] modified 2020-07-07 17:30:40 created 2008-02-03 09:22:02 id 96994

Query times: 0.0005 seconds to select prime, 0.0012 seconds to seek comments.

Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.