is 2 626389 - 1
has 188562 decimal digits
takes 0.010 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L10F75B536AC79182double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual269190.595371.0145 %62638901879167000.35617.3985 %190.951373.1590 %
Target2440.000054.5455 %1100018000000.002415.6320 %0.002461.6509 %
Difference+25+190.5953+16.4690 %+6252890+186116700+0.3537-8.2334 %+190.9490+11.5081 %

Known prime factors (1 factor, 93.7 bits, 0.01495314% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
626389157010219753599186412035669132993.66512532964320382317251104
25 × 7 × 204143 × 1083463 × 252963119
2022-03-0310834632529631193.202e+90.32620.5671

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-12-31Alex Kruppav4_computers200040000--8.97000e-58.358%
2001-04-21Alex Kruppav4_computers1000004000000--0.00724.329%
2002-05-11ANONYMOUSv4_computers163841638400--0.00219.881%
2002-06-29ANONYMOUSv4_computers32768327680012--0.00522.582%
2002-10-07ANONYMOUSv4_computers65536655360012--0.00925.234%
2003-05-19ANONYMOUSv4_computers1310721310720012--0.01827.832%
2011-07-10JossManual testing365589365589--0.00816.823%
2011-09-05JossManual testing609315609315--0.01318.400%
2012-06-19JossManual testing626489626489--0.01418.486%
2012-08-01JossManual testing12527781252778--0.02820.617%
2013-10-15David Campeaui5-2500k12800004096000012--0.07632.567%
2015-11-09Sid & AndySpeck626389018791670012--0.35637.484%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-30ANONYMOUSv4_computers2532540.002
2022-03-07LordJuliusManual testing254255
2001-04-15ANONYMOUSv4_computers212560.015
2001-10-25ANONYMOUSv4_computers212570.031
2003-02-09ANONYMOUSv4_computers212580.061
2003-02-24ANONYMOUSv4_computers212590.061
2008-10-11Sturle Sundebakeng.ifi2592600.123
2011-01-01Sid & AndyToy_Soldier2602610.245
2015-06-14lycornManual testing2612620.490
2015-10-09Gordon SpenceManual testing2622631.567
2015-10-09Gordon SpenceManual testing2632643.134
2017-06-21Smok_bmvManual testing2642655.965
2017-07-17Smok_bmvManual testing26526611.93
2017-09-04Smok_bmvManual testing26626723.86
2017-09-04Smok_bmvManual testing26726847.72
2018-03-12Smok_bmvManual testing26826995.44


ECM factoring results:
Total ECM effort:18.677 GHz-days
Estimated T-Level:26.547
DigitsB1CompleteFacMiss
201100027.2100.000%
25500003.3523.503%
302500000.30973.387%
3510000000.02397.712%
4030000000.00199.854%


ECM Summary

B1B2factorcurvesGHz-days
10.340
5000050000003605.896
2500002500000014712.44


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-04-11MadPooManual testing10F75B536AC791820.010


PRP results:
dateuseridcompidcofactorsres64
2022-03-03SRJ2877LTOS
15701021975359918641203566913
509E30746A8F3B43


CERT results:
dateuseridcompid
2022-03-03nightflyMacPro2


P-1 factor-bounds graph:
B1 = 6263890, B2 = 187916700 (P-1 stage 2)
B1 = 6263890 (P-1 stage 1)
B1 = 1280000, B2 = 40960000 (P-1 stage 2)
B1 = 1280000 (P-1 stage 1)
B1 = 1252778 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 626489 (P-1 stage 1)
B1 = 609315 (P-1 stage 1)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 365589 (P-1 stage 1)
B1 = 100000, B2 = 4000000 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 16384, B2 = 1638400 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
B1 = 16384 (P-1 stage 1)
B1 = 2000, B2 = 40000 (P-1 stage 2)
B1 = 2000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
TF factor-bounds graph:
269
268
267
266
265
264
263
262
261
260
259
258
257
256
255
254
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=26.55 ~= 72-bit
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Last modified: 2024-02-09T03:30:02+00:00