2255640269157 · 21290000 - 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: | 2255640269157 · 21290000 - 1 |
|---|---|
| Verification status (*): | Proven |
| Official Comment (*): | [none] |
| Proof-code(s): (*): | L4206 : Kumagai, TwinGen, PrimeGrid, LLR |
| Decimal Digits: | 388342 (log10 is 388341.04767638) |
| Rank (*): | 16564 (digit rank is 1268) |
| Entrance Rank (*): | 3295 |
| Currently on list? (*): | no |
| Submitted: | 11/7/2015 20:07:50 UTC |
| Last modified: | 5/20/2023 20:59:19 UTC |
| Removed (*): | 10/20/2016 20:58:43 UTC |
| Database id: | 120522 |
| Status Flags: | none |
| Score (*): | 43.7286 (normalized score 0.2469) |
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 120522 person_id 9 machine Using: Xeon 4c+4c 3.5GHz what prime notes Command: /home/caldwell/client/llr.pl 2255640269157*2^1290000-1 2>&1 Starting Lucas Lehmer Riesel prime test of 2255640269157*2^1290000-1 Using zero-padded AVX FFT length 128K, Pass1=128, Pass2=1K V1 = 5 ; Computing U0... V1 = 5 ; Computing U0...done.Starting Lucas-Lehmer loop... 2255640269157*2^1290000-1 is prime! (388342 decimal digits) Time : 774.742 sec. [Elapsed time: 12.92 minutes] modified 2020-07-07 22:30:17 created 2015-11-07 20:11:01 id 166151
Query times: 0.0002 seconds to select prime, 0.0003 seconds to seek comments.
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