is 2 2475163 - 1
has 745099 decimal digits
takes 0.172 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB9D69246221B664Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.004867.1642%2000000600000000.51907.6394%12.523869.6726%2.5085%
PrimeNet2590.031062.7119%100001800000.00192.5331%0.033063.6564%0.9446%
GPU722630.644865.0794%110001600000.00191.3793%0.646765.5610%0.4817%
Difference+4+11.3600+2.0848%+1989000+59840000+0.5170+6.2601%+11.8771+4.1116%+4.1116%

Known prime factors (1 factor, 76.6 bits, 0.00309334% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24751631117935942034985449354972476.56522583077196026796
22 × 32643887 × 172950277
2018-07-163264388717295027712,0404.05196.6817

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.290%
2003-10-31T00:00:00Team Prime Ribv4_computers15000228750---0.003--0.918%
2010-11-20T12:24:00Jocelyn LaroucheManual testing2000020000---0.002--0.313%
2010-12-11T00:04:00Jocelyn LaroucheManual testing247516247516---0.025--1.523%
2013-10-30T11:47:00David Campeaui5-2500k59500016065000---0.145--5.429%
2018-09-28T16:27:07alpertronManual testing20000006000000012---0.519--7.639%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-05-02T00:00:00ANONYMOUSv4_computers21259--0.031--
2016-02-23T16:29:15Mark RoseManual testing259260--0.031--
2009-01-15T03:16:00Sturle Sundegouffy.ifi260261--0.062--
2012-06-08T20:43:00Sebastian HornbostelManual testing261262--0.124--
2013-02-21T00:57:00dbaughManual testing262263--0.397--
2015-03-03T21:37:00VictordeHollanderManual testing263264--0.793--
2015-03-03T21:37:00VictordeHollanderManual testing264265--1.510--
2015-10-27T09:37:29ramgeisManual testing265266--3.019--
2017-07-22T20:28:36Gordon SpenceManual testing266267--6.038--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.938 GHz-days
Estimated T-Level:1.600
DigitsB1CurvesCompleteFacMiss
201100032 / 1000.32072.498%
255000032 / 2800.11489.182%

New Calculation Method

Total ECM effort:2.938 GHz-days
Estimated T-Level:1.600
DigitsB1CompleteFacMiss
20110001.03235.620%
25500000.09391.093%
302500000.00699.427%


ECM Summary

B1B2factorcurvesGHz-days
500005000000302.754
50000500000020.184


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-09T00:00:00ANONYMOUSv4_computersB9D69246221B664C0.172


PRP results:
dateuseridcompidcofactorsres64PRP
2018-07-19T20:48:18Martin RussellThunderChoad
111793594203498544935497
6208D9982CCCC3__no
2018-07-21T01:06:25arnaudstm-11-010
111793594203498544935497
6208D9982CCCC3__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 595000, B2 = 16065000 (P-1 stage 2)
B1 = 595000 (P-1 stage 1)
B1 = 247516 (P-1 stage 1)
B1 = 15000, B2 = 228750 (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
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106
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108
102
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109
TF factor-bounds graph:
267
266
265
264
263
262
261
260
259
250
260
270
280
290
2100
Last modified: 2018-09-28T16:27:07+00:00