is 21492951-1
has 449,424 decimal digits
takes 0.067 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L8CB984A905715CDCdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2654.886867.6923%2,000,00060,000,0000.33428.5700%5.221076.2623%13.1044%
PrimeNet2570.012963.1579%6,500100,0000.00082.3382%0.013665.4961%2.3382%
GPU722610.205865.5738%6,00050,0000.00050.9469%0.206366.5207%0.9469%
Difference+4+4.6810+2.1185%+1,994,000+59,950,000+0.3337+7.6230%+5.0147+9.7416%+9.7416%

Known prime factors (2 factors, 206.6 bits, 0.01383863% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
14929511755179818483848040204072477.21658782231248173853
7 × 17 × 23 × 41 × 523826436709
415.23826e+112019-05-2439,1091,848.43,452.3
149295189058690014039344820528327641622653749739129.388298263941730302417227786871912148
22 × 32 × 29 × 312 × 61 × 419 × 10259 × 48341 × 616909 × 38018173
616,90938,018,1732015-04-211.238e+110.17190.2506

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
149295115631401537325086731336886911932941082447762281281
6930538701279
63206.604
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20,000280,000---0.002--1.316%
2011-12-07T05:58:00markrtiny275,0006,000,000---0.038--4.689%
2015-04-21T11:35:00alpertronManual testing2,000,00060,000,0001239129.3880.3340.1330.6688.570%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00ANONYMOUSv4_computers?257--0.013--
2003-07-30T00:00:00ANONYMOUSv4_computers?258--0.026--
2010-05-06T11:20:00For Researchm1_fw260261--0.103--
2011-05-28T03:14:00GrunwalderGIMPManual testing21263--1.069--
2015-04-07T01:03:00snme2pm1Manual testing263264--1.315--
2015-04-07T01:03:00snme2pm1Manual testing264265--2.503--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
50,0005,000,0001779.85
50,0005,000,000774.287


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-14T00:00:00ANONYMOUSv4_computers8CB984A905715CDC0.067


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T08:19:03Oliver KruseGTX-3
890586900140393448205283276416226537497
3FA65053FC3F5D__no
2017-10-28T22:17:25kkmrkkblmbrbkc4.xlarge
890586900140393448205283276416226537497
3FA65053FC3F5D__no
2019-05-24T14:15:19ATHec2-PRPCF
175517981848384804020407
890586900140393448205283276416226537497
CC43B5F83EFC8506no
2019-05-25T12:49:53kkmrkkblmbrbkc5.large
175517981848384804020407
890586900140393448205283276416226537497
CC43B5F83EFC8506no


P-1 factor-bounds graph:
B1 = 2,000,000, B2 = 60,000,000 (stage 2)
B1 = 2,000,000 (stage 1)
B1 = 275,000, B2 = 6,000,000 (stage 2)
B1 = 275,000 (stage 1)
B1 = 20,000, B2 = 280,000 (stage 2)
B1 = 20,000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2019-05-25T12:49:53+00:00