is 21326889-1
has 399,434 decimal digits
takes 0.051 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LC28C0CEF7DDDEA65double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2631.202866.6667%3,990,000143,640,0000.642111.7180%1.844978.3846%15.8846%
PrimeNet2560.007262.5000%6,000100,0000.00062.6041%0.007965.1041%2.6041%
GPU722600.115865.0000%5,50040,0000.00040.9778%0.116265.9778%0.9778%
Difference+3+1.0871+1.6667%+3,984,500+143,600,000+0.6417+10.7402%+1.7288+12.4069%+12.4069%

Known prime factors (1 factor, 75.1 bits, 0.00566182% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
1326889412283845848247814857512375.12615535732297435875
34 × 53 × 7 × 47 × 929 × 5020247
9295,020,2472014-02-129,305.60.01520.0283

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers15,000213,750---0.001--1.465%
2013-09-29T03:58:00David Campeaui5-2500k3,990,000143,640,000---0.642--11.718%
2016-03-17T19:05:02alpertronManual testing500,00015,000,00012---0.071--7.131%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-03T00:00:00ANONYMOUSv4_computers?257--0.014--
2003-06-23T00:00:00ANONYMOUSv4_computers?258--0.029--
2009-02-20T17:25:00Sturle Sundegimo.ifi260261--0.116--
2012-09-15T18:40:00AxelssonManual testing261262--0.232--
2013-01-10T10:19:00dbaughManual testing262263--0.740--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50,0005,000,00024911.61


Lucas-Lehmer results:
Exponent "1326889" not found


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T03:59:13Oliver KruseGTX-0
41228384584824781485751
4C485DDAD44974__no
2017-10-23T15:13:11kkmrkkblmbrbkc4.xlarge
41228384584824781485751
4C485DDAD44974__no


P-1 factor-bounds graph:
B1 = 3,990,000, B2 = 143,640,000 (stage 2)
B1 = 3,990,000 (stage 1)
B1 = 500,000, B2 = 15,000,000 (stage 2)
B1 = 500,000 (stage 1)
B1 = 15,000, B2 = 213,750 (stage 2)
B1 = 15,000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2018-09-21T10:45:58+00:00