is 2 2937269 - 1
has 884207 decimal digits
takes 0.250 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L9237C0FB61EE4D5Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26820.292667.6471 %1000000200000000.25125.5410 %20.543869.4397 %
Target2630.543465.0794 %1700015000000.01211.9460 %0.555465.7589 %
Difference+5+19.7493+2.5677 %+983000+18500000+0.2391+3.5950%+19.9883+3.6808 %

Known prime factors (1 factor, 78.3 bits, 0.00266404% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
29372693594504994989173372830332478.25061187875454872764
22 × 34 × 13 × 89 × 163225123123
2020-12-118916322512312320,8411,097.52,049.8

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-12-13ANONYMOUSv4_computers2048204800--0.0020.691%
2010-11-08markrtiny10500022837506--0.0284.560%
2015-04-29VictordeHollanderManual testing10000002000000012--0.2518.650%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2016-02-23Mark RoseManual testing212600.052
2009-02-13Sturle Sundekinner.ifi2602610.052
2012-01-01markroldgamer2612620.105
2013-01-07dbaughManual testing2622630.334
2015-04-25VictordeHollanderManual testing2632640.668
2015-04-25VictordeHollanderManual testing2642651.272
2016-02-23ramgeisManual testing2652662.544
2017-11-24Gordon SpenceManual testing2662675.088
2018-12-22chuenkitManual testing26726810.18


ECM factoring results:
Total ECM effort:4.837 GHz-days
Estimated T-Level:20.783
DigitsB1CompleteFacMiss
20110001.69218.409%
25500000.15785.506%
302500000.01099.017%


ECM Summary

B1B2factorcurvesGHz-days
500005000000394.258
50000500000050.579


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-23ANONYMOUSv4_computers9237C0FB61EE4D5A0.250
2018-10-09kkmrkkblmbrbkold9237C0FB61EE4D5A0.250


PRP results:
dateuseridcompidcofactorsres64
2020-12-11mrhw
359450499498917337283033
1B030EB147AD742D


CERT results:
dateuseridcompid
2020-12-11curtiscwcm201--09l


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 105000, B2 = 2283750 (P-1 stage 2)
B1 = 105000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=20.78 ~= 52-bit
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Last modified: 2024-02-29T14:28:04+00:00