280680 · (21257787 - 1) + 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: | 280680 · (21257787 - 1) + 1 |
|---|---|
| Verification status (*): | Proven |
| Official Comment (*): | [none] |
| Unofficial Comments: | This prime has 1 user comment below. |
| Proof-code(s): (*): | p373 : Morelli, OpenPFGW |
| Decimal Digits: | 378638 (log10 is 378637.06336768) |
| Rank (*): | 18269 (digit rank is 4) |
| Entrance Rank (*): | 2694 |
| Currently on list? (*): | no |
| Submitted: | 1/10/2014 20:26:38 UTC |
| Last modified: | 5/20/2023 20:59:19 UTC |
| Removed (*): | 4/28/2015 19:01:21 UTC |
| Database id: | 116879 |
| Status Flags: | none |
| Score (*): | 43.6509 (normalized score 0.2631) |
User comments about this prime (disclaimer):
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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 116879 person_id 9 machine WinXP Dual Core 2.6GHz 64-bit Laptop what prime notes Command: pfgw64.exe -t -hhelp.txt -q"280680*(2^1257787-1)+1" 2>&1 PFGW Version 3.7.3.64BIT.20130210.Win_Dev [GWNUM 27.8] Primality testing 280680*(2^1257787-1)+1 [N-1, Brillhart-Lehmer-Selfridge] Reading factors from helper file help.txt Running N-1 test using base 17 Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 280680*(2^1257787-1)+1 is prime! (11578.6348s+0.0503s) [Elapsed time: 11580 seconds] Helper File: 2^1257787-1 modified 2020-07-07 22:30:18 created 2014-01-12 05:46:08 id 162404
Query times: 0.0003 seconds to select prime, 0.0004 seconds to seek comments.
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