is 2 102520021 - 1
has 30861602 decimal digits
takes 408.193 GHz-days to do one PRP test
Last-known PrimeNet details:
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual276149.278164.4737%100000001000000057.73323.8124%207.011368.2860%5.7860%
PrimeNet2729.328362.5000%450000220000009.37655.3807%18.704767.8807%5.3807%
GPU72276149.278164.4737%6500002200000010.46823.8521%159.746368.3258%3.8521%
Difference---+9350000-12000000+47.2649-0.0398%+47.2649-0.0398%-0.0398%

Known prime factors (1 factor, 83.7 bits, 0.00008165% known):
Remaining cofactor is PRP status unknown

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
102520021157713116703018641128260172683.70676918203471212048
24 × 112 × 17 × 12899 × 181183571
128991811835712021-02-0531,30057.061106.44

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-02-05T02:53:48Mihai PredaManual testing10000000100000002683.70657.73816.4115.53.812%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-04-26T00:29:001997rj7Manual testing263264--0.019--
2010-08-19T01:29:00For Researchm1_fw264265--0.036--
2012-04-23T15:15:00Donna NobleOpt6128x4x4265266--0.073--
2013-09-07T01:20:00processinfoManual testing266267--0.146--
2014-05-03T14:42:00SMoffatManual testing267268--0.292--
2014-05-06T01:32:00SMoffatManual testing268269--0.583--
2014-07-11T02:48:00SMoffatManual testing269270--1.166--
2014-07-11T09:55:00Ryan PropperManual testing270271--2.332--
2015-01-09T19:14:00shaugeManual testing271272--4.665--
2020-03-29T06:33:24SRBaseManual testing272273--9.330--
2020-03-31T14:04:59SRBaseManual testing273274--18.66--
2020-11-08T21:35:02TheJudgerManual testing274275--37.32--
2020-11-08T21:35:02TheJudgerManual testing275276--74.64--


ECM factoring results:
Exponent "102520021" not found


Lucas-Lehmer results:
Exponent "102520021" not found


PRP results:
Exponent "102520021" not found


P-1 factor-bounds graph:
B1 = 10000000 (stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
276
275
274
273
272
271
270
269
268
267
266
265
264
250
260
270
280
290
2100
Last modified: 2021-02-05T02:55:25+00:00