is 2 1634753 - 1
has 492110 decimal digits
takes 0.073 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA601F3A8700EAA17double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26718.176468.6567%1000000200000000.13185.6818%18.308270.4376%1.7809%
PrimeNet2570.011763.1579%70001200000.00092.5588%0.012664.1006%0.9427%
GPU722610.187965.5738%6500700000.00061.1190%0.188665.9590%0.3852%
Difference+6+17.9885+3.0829%+993500+19930000+0.1312+4.5627%+18.1197+4.4786%+4.4786%

Known prime factors (1 factor, 86.0 bits, 0.00526107% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1634753776693116812435082239170632686.00623755671860288223427
11 × 13 × 107 × 1553 × 39293 × 25442563
2017-06-2139293254425639,974,4690.09220.1677

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-29T16:08:00AxonManual testing100000100000---0.006--0.876%
2012-02-29T17:11:00AxonManual testing200000200000---0.013--1.279%
2012-02-29T18:06:00AxonManual testing300000300000---0.019--1.560%
2012-02-29T18:11:00AxonManual testing400000400000---0.026--1.780%
2012-02-29T19:07:00AxonManual testing500000500000---0.032--1.961%
2012-02-29T19:11:00AxonManual testing600000600000---0.039--2.118%
2012-02-29T20:07:00AxonManual testing700000700000---0.045--2.255%
2012-02-29T20:11:00AxonManual testing800000800000---0.052--2.378%
2012-02-29T21:07:00AxonManual testing900000900000---0.058--2.489%
2012-02-29T21:12:00AxonManual testing10000001000000---0.065--2.591%
2012-03-01T06:06:00AxonManual testing10000008000000---0.089--4.718%
2012-03-01T07:07:00AxonManual testing100000020000000---0.132--5.682%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-07T00:00:00ANONYMOUSv4_computers21257--0.012--
2003-06-17T00:00:00ANONYMOUSv4_computers21258--0.023--
2016-02-23T16:28:42Mark RoseManual testing258260--0.070--
2010-05-01T18:20:00Architects Cubedm1_f2260261--0.094--
2016-02-23T16:28:42Mark RoseManual testing261262--0.188--
2010-09-26T01:51:00GrunwalderGIMPManual testing21263--0.976--
2016-02-23T16:28:42Mark RoseManual testing262263--0.600--
2015-05-03T01:34:00omylistManual testing263264--1.201--
2015-05-03T12:18:00monstManual testing264265--2.286--
2015-10-11T16:52:31ramgeisManual testing265266--4.571--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.103 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.103 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025014.05
50000500000010.056


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-14T00:00:00ANONYMOUSv4_computersA601F3A8700EAA170.073
2015-07-10T01:00:00MadPooManual testingA601F3A8700EAA170.073


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T13:09:17alpertronManual testing
77669311681243508223917063
0FCA1B8D2FD46D__no
2017-10-18T11:28:14Oliver KruseGTX-0
77669311681243508223917063
0FCA1B8D2FD46D__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000, B2 = 8000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 900000 (P-1 stage 1)
B1 = 800000 (P-1 stage 1)
B1 = 700000 (P-1 stage 1)
B1 = 600000 (P-1 stage 1)
B1 = 500000 (P-1 stage 1)
B1 = 400000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
257
250
260
270
280
290
2100
Last modified: 2019-10-28T14:13:43+00:00