is 2 1763131 - 1
has 530756 decimal digits
takes 0.096 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L4E346D9FAEE3422Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26833.806369.1176 %17631311939444100.96238.0158 %34.768671.5931 %
Target2610.174265.5738 %80006000000.00321.4532 %0.177466.0740 %
Difference+7+33.6320+3.5439 %+1755131+193344410+0.9592+6.5626%+34.5912+5.5191 %

Known prime factors (1 factor, 75.6 bits, 0.00428756% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1763131570763415752934549824972375.59516186075105960208
24 × 7333 × 137955774461
2020-01-2573331379557744614,340.0591.241,104.3

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-02-07Carsten Kossendeymother9500015912506--0.0144.832%
2014-04-08JossManual testing100000100000--0.0082.024%
2014-05-09JossManual testing136404136404--0.0112.337%
2014-09-17ANONYMOUSManual testing172808172808--0.0142.592%
2015-05-02mikrMSI24754008666000012--0.55612.673%
2018-07-10JossManual testing17631318815655012---12.481%
2018-08-13JossManual testing176313117631310012--0.88713.613%
2018-10-19JossManual testing176313119394441012--0.96213.767%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-25ANONYMOUSv4_computers212580.022
2016-02-23Mark RoseManual testing2582600.065
2010-04-20Architects Cubedm1_f22602610.087
2016-02-23Mark RoseManual testing2612620.174
2010-12-13GrunwalderGIMPManual testing212630.905
2016-02-23Mark RoseManual testing2622630.557
2015-04-29snme2pm1Manual testing2632641.114
2015-04-29snme2pm1Manual testing2642652.119
2015-10-13ramgeisManual testing2652664.238
2018-04-23TJAOIManual testing2662678.477
2019-08-16TJAOIManual testing26726816.95


ECM factoring results:
Total ECM effort:88.253 GHz-days
Estimated T-Level:25.911
DigitsB1CompleteFacMiss
201100015.9040.000%
25500001.98013.804%
302500000.18283.336%
3510000000.01498.635%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025017.09
50000500000010.069
2500002100010425071.09


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-28ANONYMOUSv4_computers4E346D9FAEE3422C0.096
2015-07-04MadPooManual testing4E346D9FAEE3422C0.096


PRP results:
dateuseridcompidcofactorsres64
2020-01-25mrhi
57076341575293454982497
8CC71E61FFC390E1
2020-01-26marssystemssystem11
57076341575293454982497
8CC71E61FFC390E1


CERT results:
No CERT results for M1763131


P-1 factor-bounds graph:
B1 = 1763131, B2 = 193944410 (P-1 stage 2)
B1 = 1763131, B2 = 176313100 (P-1 stage 2)
B1 = 2475400, B2 = 86660000 (P-1 stage 2)
B1 = 1763131, B2 = 88156550 (P-1 stage 2)
B1 = 2475400 (P-1 stage 1)
B1 = 1763131 (P-1 stage 1)
B1 = 95000, B2 = 1591250 (P-1 stage 2)
B1 = 172808 (P-1 stage 1)
B1 = 136404 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.91 ~= 69-bit
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Last modified: 2024-02-29T14:28:04+00:00