is 2 2639339 - 1
has 794521 decimal digits
takes 0.204 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LF96FE2509837BBC1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26711.258167.1642 %2000000600000000.57797.6898 %11.836069.6892 %
Target2630.604765.0794 %1300010000000.00751.5735 %0.612265.6288 %
Difference+4+10.6534+2.0848 %+1987000+59000000+0.5704+6.1163%+11.2238+4.0603 %

Known prime factors (1 factor, 66.0 bits, 0.00250020% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2639339732123330630805165372065.98913869444785812
22 × 73 × 11 × 37 × 24837653
2016-01-04343248376532.76420.15160.2831

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-10-31ANONYMOUSv4_computers2048204800--0.0010.671%
2009-06-21USAFSSP4_260030000420000--0.0062.403%
2011-01-17James Heinrichi7-92018000043200006--0.0455.501%
2019-07-04alpertronManual testing20000006000000012
skipped known factor: 73212333063080516537
---10.617%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-08-07ANONYMOUSv4_computers212590.015
2016-02-23Mark RoseManual testing2592600.029
2009-01-27Sturle Sundekinner.ifi2602610.058
2012-06-12Grant McCrackenhome2612620.116
2013-01-23dbaughManual testing2622630.372
2015-02-23VictordeHollanderManual testing2632640.744
2015-02-23VictordeHollanderManual testing2642651.416


ECM factoring results:
Total ECM effort:1.239 GHz-days
Estimated T-Level:2.500
DigitsB1CompleteFacMiss
20110000.50060.653%
25500000.04695.479%
302500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
500005000000121.136
50000500000010.103


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-14MadPooManual testingF96FE2509837BBC10.225


PRP results:
dateuseridcompidcofactorsres64
2017-09-30alpertronManual testing
73212333063080516537
D0B51BB65293A1BE
2017-11-14Oliver KruseThreadripper-PC
73212333063080516537
D0B51BB65293A1BE


CERT results:
No CERT results for M2639339


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 180000, B2 = 4320000 (P-1 stage 2)
B1 = 180000 (P-1 stage 1)
B1 = 30000, B2 = 420000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
TF factor-bounds graph:
265
264
263
262
261
260
259
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=2.5 ~= -8-bit
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260
270
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Last modified: 2024-02-29T14:28:04+00:00