2991961 - 2495981 + 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: | 2991961 - 2495981 + 1 |
|---|---|
| Verification status (*): | Proven |
| Official Comment (*): | Gaussian Mersenne norm 36, generalized unique |
| Proof-code(s): (*): | x28 : Iskra |
| Decimal Digits: | 298611 (log10 is 298610.01552884) |
| Rank (*): | 23387 (digit rank is 1) |
| Entrance Rank (*): | 108 |
| Currently on list? (*): | yes |
| Submitted: | 11/29/2005 09:21:01 UTC |
| Last modified: | 3/11/2023 15:54:10 UTC |
| Database id: | 76312 |
| Status Flags: | none |
| Score (*): | 42.921 (normalized score 0.1101) |
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.
- Gaussian Mersenne norm (archivable *)
- Prime on list: yes, rank 6
Subcategory: "Gaussian Mersenne norm"
(archival tag id 187105, tag last modified 2023-03-11 15:53:59)- Generalized Unique (archivable *)
- Prime on list: no, rank 138
Subcategory: "Generalized Unique"
(archival tag id 224202, tag last modified 2023-12-18 15:37:22)
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 76312 person_id 9 machine Linux P4 2.8GHz what prime notes Command: /home/caldwell/client/pfgw -f -t -q"2^991961-2^495981+1" 2>&1 PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4] Primality testing 2^991961-2^495981+1 [N-1, Brillhart-Lehmer-Selfridge] trial factoring to 109386855 Running N-1 test using base 13 Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(131072,20) to FFT(131072,19) Reduced from FFT(131072,19) to FFT(131072,18) Reduced from FFT(131072,18) to FFT(131072,17) Reduced from FFT(131072,17) to FFT(131072,16) 1983930 bit request FFT size=(131072,16) Calling Brillhart-Lehmer-Selfridge with factored part 50.00% 2^991961-2^495981+1 is prime! (19609.3144s+0.0092s) [Elapsed time: 19609 seconds] modified 2020-07-07 22:30:43 created 2005-11-29 09:23:00 id 81518
Query times: 0.0002 seconds to select prime, 0.0003 seconds to seek comments.
Printed from the PrimePages <t5k.org> © Reginald McLean.