is 21420931-1
has 427,743 decimal digits
takes 0.054 GHz-days to do one L-L test
Last-known PrimeNet details:
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2631.123266.6667%500,00015,000,0000.07147.1873%1.194673.8539%11.3539%
PrimeNet2560.006862.5000%6,500110,0000.00072.7701%0.007465.2701%2.7701%
GPU722600.108165.0000%6,00080,0000.00061.3019%0.108666.3019%1.3019%
Difference+3+1.0151+1.6667%+494,000+14,920,000+0.0709+5.8854%+1.0860+7.5521%+7.5521%

Known prime factors (4 factors, 295.3 bits, 0.02078118% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
1420931256309380990311444.5439019065
3 × 5 × 11 × 47 × 1163
471,163-1.944e-65.968e-66.544e-6
1420931623287518217691445.82521932364
22 × 3 × 1827697
41,827,6972014-01-304.173e-60.00550.0103
1420931472007754860033888386211292685.28716609101879684301644
22 × 3 × 780719 × 1772842499423
780,7191.77284e+122019-02-1510,986,0465,347.49,987.4
1420931102948878826381308746566924983137485737119.631362258543259248016781134780588
22 × 34 × 1861 × 7207 × 21191 × 61643 × 197599 × 322963
197,599322,9632015-02-151.295e+110.01130.0223

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
142093115975443797336269109836058392890.368
1420931120980015470801272426699176296649102599940129.830
1420931294196542106214327843611437530472555720140131.112
14209312638676340563622507897481953574717089457674946356750164.174
14209316416675118698890028195433679467210921429269186203350165.456
142093175405333596733466129917895521150994564436561193172
231
53175.655
142093148592669160197922051101222699405982926816079234186
158199553553
62204.918
142093116446540276896364466136519090375794887139383465694
91944742990023
64209.999
142093112454756953117256274241686893752725703711553594800
36043911638177282701907143
76249.461
142093130287204164433045373471835914382240342239258091705
82358264506753591226695257
76250.743
142093177628945513129730672661238744799389295022084864680
624656543301723170377084969831923995967
89295.286
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-02-16T12:52:00alpertronManual testing500,00015,000,0001237119.6310.0280.1090.0557.187%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2014-01-30T08:32:00TJAOIManual testing??45.825148.73937e-70.1171.88576e-6


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
50,0005,000,0001275.991
50,0005,000,0001245.849


Lucas-Lehmer results:
Exponent "1420931" not found


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T20:04:02Oliver KruseGTX-1
25630938099031
62328751821769
1029488788263813087465669249831374857
1E5E2D8DBC75DDF2no
2017-10-05T21:17:40Oliver KruseManual testing
25630938099031
62328751821769
1029488788263813087465669249831374857
1E5E2D8DBC75DD__no
2017-10-26T13:07:12kkmrkkblmbrbkc4.xlarge
25630938099031
62328751821769
1029488788263813087465669249831374857
1E5E2D8DBC75DD__no
2019-02-15T13:38:21ATHec2-PRPCF
25630938099031
62328751821769
47200775486003388838621129
1029488788263813087465669249831374857
2222A244CCAC8149no
2019-02-16T12:00:14kkmrkkblmbrbkc5.large
25630938099031
62328751821769
47200775486003388838621129
1029488788263813087465669249831374857
2222A244CCAC8149no


P-1 factor-bounds graph:
B1 = 500,000, B2 = 15,000,000 (stage 2)
B1 = 500,000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2019-02-16T12:00:14+00:00