
At this site we maintain a list of the 5000 Largest Known Primes which is updated hourly. This list is the most important databases at The Prime Pages: 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:
field (help)  value 
Description:  U(475,  1, 5039) 
Verification status (*):  PRP 
Official Comment:  Generalized Lucas number, cyclotomy 
Unofficial Comments:  This prime has 1 user comment below. 
Proofcode(s): (*):  x25 : Water, Broadhurst, Primo, OpenPFGW 
Decimal Digits:  13486 (log_{10} is 13485.1921007) 
Rank (*):  70449 (digit rank is 2) 
Entrance Rank (*):  19247 
Currently on list? (*):  no 
Submitted:  12/29/2003 14:49:12 CDT 
Last modified:  12/29/2003 14:49:12 CDT 
Database id:  67876 
Status Flags:  Verify 
Score (*):  33.3664 (normalized score 0) 

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.
 Cyclotomy Proof (tolerated *)
 Prime on list: no, rank 29
Subcategory: "Cyclotomy Proof"
(archival tag id 193026, tag last modified 20181121 18:50:17)  Generalized Lucas Number (archivable *)
 Prime on list: no, rank 27
Subcategory: "Generalized Lucas Number"
(archival tag id 193025, tag last modified 20181121 18:50:18)
User comments about this prime (disclaimer):
User comments are allowed to convey mathematical information about this number, how it was proven prime.... See our guidelines and restrictions.
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  67876 
person_id  9 
machine  Linux P4 2.8GHz 
what  prp 
notes  Command: /home/caldwell/client/pfgw f tc q"lucasU(475,1,5039)" 2>&1 PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4] Primality testing lucasU(475,1,5039) [N1/N+1, BrillhartLehmerSelfridge] trial factoring to 3968513 Running N1 test using base 31 Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(6144,21) to FFT(6144,20) Reduced from FFT(6144,20) to FFT(6144,19) Reduced from FFT(6144,19) to FFT(6144,18) Reduced from FFT(6144,18) to FFT(6144,17) Reduced from FFT(6144,17) to FFT(6144,16) 89602 bit request FFT size=(6144,16) Running N1 test using base 47 Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(6144,21) to FFT(6144,20) Reduced from FFT(6144,20) to FFT(6144,19) Reduced from FFT(6144,19) to FFT(6144,18) Reduced from FFT(6144,18) to FFT(6144,17) Reduced from FFT(6144,17) to FFT(6144,16) 89602 bit request FFT size=(6144,16) Running N1 test using base 53 Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(6144,21) to FFT(6144,20) Reduced from FFT(6144,20) to FFT(6144,19) Reduced from FFT(6144,19) to FFT(6144,18) Reduced from FFT(6144,18) to FFT(6144,17) Reduced from FFT(6144,17) to FFT(6144,16) 89602 bit request FFT size=(6144,16) Running N1 test using base 79 Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(6144,21) to FFT(6144,20) Reduced from FFT(6144,20) to FFT(6144,19) Reduced from FFT(6144,19) to FFT(6144,18) Reduced from FFT(6144,18) to FFT(6144,17) Reduced from FFT(6144,17) to FFT(6144,16) 89602 bit request FFT size=(6144,16) Running N1 test using base 97 Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(6144,21) to FFT(6144,20) Reduced from FFT(6144,20) to FFT(6144,19) Reduced from FFT(6144,19) to FFT(6144,18) Reduced from FFT(6144,18) to FFT(6144,17) Reduced from FFT(6144,17) to FFT(6144,16) 89602 bit request FFT size=(6144,16) Running N+1 test using discriminant 103, base 3+sqrt(103) Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(6144,21) to FFT(6144,20) Reduced from FFT(6144,20) to FFT(6144,19) Reduced from FFT(6144,19) to FFT(6144,18) Reduced from FFT(6144,18) to FFT(6144,17) Reduced from FFT(6144,17) to FFT(6144,16) 89610 bit request FFT size=(6144,16) Calling N1 BLS with factored part 1.75% and helper 0.75% (6.01% proof) lucasU(475,1,5039) is Fermat and Lucas PRP! (521.4483s+0.2574s)

modified  20040116 11:28:34 
created  20031229 14:53:01 
id  72814 

Query times: 0.0003 seconds to select prime, 0.0003 seconds to seek comments.
