2 · 7136977 + 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.
This prime's information:
| Description: | 2 · 7136977 + 1 |
|---|---|
| Verification status (*): | Proven |
| Official Comment (*): | Divides Phi(71^36977,2) |
| Proof-code(s): (*): | gb1 : Keller, Buechel, PRP, Proth.exe |
| Decimal Digits: | 68455 (log10 is 68454.280990581) |
| Rank (*): | 57561 (digit rank is 1) |
| Entrance Rank (*): | 750 |
| Currently on list? (*): | no |
| Submitted: | 11/12/2003 21:45:43 UTC |
| Last modified: | 3/11/2023 15:54:10 UTC |
| Database id: | 67168 |
| Status Flags: | none |
| Score (*): | 38.386 (normalized score 0.0008) |
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.
- Divides Phi (archivable *)
- Prime on list: no, rank 88
Subcategory: "Divides Phi"
(archival tag id 188679, tag last modified 2023-03-11 15:53:59)
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 67168 person_id 9 machine Linux P4 2.8GHz what prime notes Command: /home/caldwell/client/pfgw -f -t -q"2*71^36977+1" 2>&1 PFGW Version 20030811.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4] trial factoring to 22731517 Running N-1 test using base 5 Primality testing 2*71^36977+1 [N-1, Brillhart-Lehmer-Selfridge] Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(28672,20) to FFT(28672,19) Reduced from FFT(28672,19) to FFT(28672,18) Reduced from FFT(28672,18) to FFT(28672,17) Reduced from FFT(28672,17) to FFT(28672,16) 454810 bit request FFT size=(28672,16) Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 2*71^36977+1 is prime! (2618.7209s+0.0709s) modified 2020-07-07 22:30:47 created 2003-11-12 21:53:00 id 72096
Query times: 0.0002 seconds to select prime, 0.0003 seconds to seek comments.
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