is 2 2766763 - 1
has 832879 decimal digits
takes 0.214 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L0826E77A5F97376Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27086.364768.5714 %5000000868133175053.499912.2990 %139.864672.4368 %
Target2630.576965.0794 %1500012000000.00891.7459 %0.585865.6890 %
Difference+7+85.7878+3.4921 %+4985000+8680131750+53.4910+10.5531%+139.2789+6.7478 %

Known prime factors:
No known factors for M2766763

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-11-16ANONYMOUSv4_computers2048204800--0.0010.680%
2010-12-01markrtiny11000023650006--0.0294.587%
2016-08-10JossManual testing14200047300006--0.0485.463%
2016-10-26JossManual testing170400170400---2.157%
2016-12-23JossManual testing204480204480---2.338%
2017-02-02mikrMSI27000008400000012--0.77811.373%
2017-02-25JossManual testing29445129445106---5.387%
2023-02-01JossManual testing1000000413395290--2.89612.943%
2023-03-01Architects Cubedgpu7250000008681331750--58.9519.190%


Trial Factoring results:
5758596061626364656667686970
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-05-09ANONYMOUSv4_computers212590.014
2016-02-23Mark RoseManual testing2592600.028
2009-01-31Sturle Sundegofy.ifi2602610.056
2012-03-13markroldgamer2612620.111
2013-01-14dbaughManual testing2622630.355
2015-04-21VictordeHollanderManual testing2632652.060
2016-02-08ramgeisManual testing2652662.701
2017-10-12Gordon SpenceManual testing2662675.402
2019-02-21chuenkitManual testing26726810.80
2021-06-07TJAOIManual testing26826921.61
2023-09-08TJAOIManual testing26927043.21


ECM factoring results:
Total ECM effort:20.369 GHz-days
Estimated T-Level:23.494
DigitsB1CompleteFacMiss
20110007.5620.052%
25500000.69949.718%
302500000.04495.674%
3510000000.00299.793%


ECM Summary

B1B2factorcurvesGHz-days
50000500000012012.11
50000585000070.781
500006650000505.788
50000681470470.842
50000690000070.847


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-04ANONYMOUSv4_computers0826E77A5F97376D0.214
2018-08-19kkmrkkblmbrbkold0826E77A5F97376D0.208


PRP results:
No PRP results for M2766763


CERT results:
No CERT results for M2766763


P-1 factor-bounds graph:
B1 = 5000000, B2 = 8681331750 (P-1 stage 2)
B1 = 1000000, B2 = 413395290 (P-1 stage 2)
B1 = 2700000, B2 = 84000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 2700000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 294451, B2 = 2944510 (P-1 stage 2)
B1 = 142000, B2 = 4730000 (P-1 stage 2)
B1 = 294451 (P-1 stage 1)
B1 = 110000, B2 = 2365000 (P-1 stage 2)
B1 = 204480 (P-1 stage 1)
B1 = 170400 (P-1 stage 1)
B1 = 142000 (P-1 stage 1)
B1 = 110000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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1010
TF factor-bounds graph:
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this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=23.49 ~= 61-bit
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Last modified: 2024-03-13T02:15:48+00:00