is 2 63459197 - 1
has 19103122 decimal digits
takes 149.070 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA3DF2F23A5A183F1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27460.288664.8649%890000195800006.49994.4662%66.788566.4341%1.5692%
PrimeNet2703.765462.8571%260000120000003.06435.1575%6.829764.7728%1.9156%
GPU7227460.288664.8649%400000140000003.88633.7868%64.174966.1954%1.3305%
Difference---+490000+5580000+2.6136+0.6793%+2.6136+0.2387%+0.2387%

Known prime factors:
No known factors for M63459197

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-09-04T09:27:00Jerry HallettQuadTF89000019580000---6.500--4.466%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-11-17T00:00:00ANONYMOUSv4_computers21250--2.36357e-6--
2003-07-30T00:00:00ANONYMOUSv4_computers21259--0.001--
2016-02-23T17:18:48Mark RoseManual testing259263--0.024--
2009-02-22T09:57:00Wojciech Florekarmada1263264--0.031--
2009-09-08T09:20:00TBM PrimeNB264265--0.059--
2009-11-09T05:18:00Sturle Sundegigotte.ifi265266--0.118--
2009-11-20T01:42:00AZMangoOldPC266267--0.236--
2009-11-25T18:38:00SAHS Science Deptold_laptop267268--0.471--
2009-11-29T21:12:00ANONYMOUS268269--0.942--
2011-12-28T23:23:00ITSLJCA_-_ServerStation269270--1.884--
2012-08-20T21:06:00Cow_tippingManual testing270271--3.768--
2013-06-12T18:34:00TheJudgerManual testing271272--7.536--
2013-06-12T18:34:00TheJudgerManual testing272273--15.07--
2013-09-01T23:13:00RichD0Manual testing273274--30.15--


ECM factoring results:
No ECM results for M63459197


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2014-08-30T14:26:00Ed BrightAMDquadA3DF2F23A5A183F1149.1
2021-10-20T18:46:49Chad SteenersonLulabelle7A3DF2F23A5A183F1149.1


PRP results:
No PRP results for M63459197


P-1 factor-bounds graph:
B1 = 890000, B2 = 19580000 (P-1 stage 2)
B1 = 890000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-10-20T18:46:49+00:00