is 2 2695787 - 1
has 811513 decimal digits
takes 0.208 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L2BD63D25C279D23Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26822.110467.6471 %2000000500000000.51696.8703 %22.627269.8698 %
Target2630.592065.0794 %1400011000000.00821.6608 %0.600265.6593 %
Difference+5+21.5183+2.5677 %+1986000+48900000+0.5087+5.2095%+22.0270+4.2105 %

Known prime factors (1 factor, 72.7 bits, 0.00269719% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
269578777271022386258259633992272.7101433181152410377
3 × 37 × 650779 × 19840133
2019-11-1565077919840133566.490.19000.2261

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-11-08ANONYMOUSv4_computers2048204800--0.0010.675%
2003-11-28Team Prime Ribv4_computers15000217500--0.0031.689%
2010-12-16JossManual testing2000020000--0.0020.632%
2010-12-26JossManual testing3000030000--0.0040.835%
2011-01-15JossManual testing5000050000--0.0061.146%
2011-04-20James HeinrichWHS18500045325006--0.0475.587%
2017-01-10JossManual testing222000222000---2.413%
2017-05-13JossManual testing37000037000006--0.0685.757%
2019-11-15masserManual testing2000000500000001222272.7100.57010.354%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2016-02-23Mark RoseManual testing212600.057
2009-01-31Sturle Sundekraus.ifi2602610.057
2012-04-30markroldgamer2612620.114
2013-01-10dbaughManual testing2622630.364
2015-02-23VictordeHollanderManual testing2632652.114
2016-01-28YxinityManual testing2652662.772
2017-09-15Gordon SpenceManual testing2662675.544
2019-03-11TJAOIManual testing26726811.09


ECM factoring results:
Total ECM effort:3.360 GHz-days
Estimated T-Level:20.587
DigitsB1CompleteFacMiss
20110001.26928.105%
25500000.11788.920%
302500000.00799.262%


ECM Summary

B1B2factorcurvesGHz-days
500005000000333.360


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-30ANONYMOUSv4_computers2BD63D25C279D23F0.208
2018-07-30kkmrkkblmbrbkold2BD63D25C279D23F0.203


PRP results:
dateuseridcompidcofactorsres64
2019-11-15ATHec2-PRPCF
7727102238625825963399
3CB6A13750D2C7F8
2019-11-15francijezekBeQuiet
7727102238625825963399
3CB6A13750D2C7F8
2019-11-16NumberwangHallowes
7727102238625825963399
3CB6A13750D2C7F8


CERT results:
No CERT results for M2695787


P-1 factor-bounds graph:
B1 = 2000000, B2 = 50000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 370000, B2 = 3700000 (P-1 stage 2)
B1 = 185000, B2 = 4532500 (P-1 stage 2)
B1 = 370000 (P-1 stage 1)
B1 = 222000 (P-1 stage 1)
B1 = 185000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
TF factor-bounds graph:
268
267
266
265
263
262
261
260
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=20.59 ~= 52-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00