is 2 1924969 - 1
has 579474 decimal digits
takes 0.104 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD2F8B3527EA54A29double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.436068.6567%1000000300000000.20296.2269%15.639070.6084%1.9517%
PrimeNet2570.010063.1579%90001700000.00143.0943%0.011464.2979%1.1400%
GPU722610.159665.5738%110001700000.00151.8139%0.161166.1982%0.6244%
Difference+6+15.2765+3.0829%+989000+29830000+0.2014+4.4130%+15.4779+4.4102%+4.4102%

Known prime factors (1 factor, 75.3 bits, 0.00391397% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1924969479080184444210463063192375.34312443841548726511
3 × 7 × 11 × 4729 × 11391297089
2017-12-204729113912970894,173.848.82191.183

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-09-29T18:07:00kurlyhex100000030000000---0.203--6.227%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-12-16T00:00:00ANONYMOUSv4_computers21258--0.020--
2016-02-23T16:28:58Mark RoseManual testing258260--0.060--
2009-06-05T17:45:00Architects Cubedi4l_1260261--0.080--
2016-02-23T16:28:58Mark RoseManual testing261262--0.160--
2011-08-27T22:20:00GrunwalderGIMPManual testing21263--0.829--
2016-02-23T16:28:58Mark RoseManual testing262263--0.510--
2015-05-17T18:51:00snme2pm1Manual testing263264--1.020--
2015-05-17T18:51:00snme2pm1Manual testing264265--1.941--
2015-09-03T11:06:00ramgeisManual testing265266--3.882--


ECM factoring results:

Old Calculation Method

Total ECM effort:20.394 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:20.394 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.8290.015%
25500000.78545.631%
302500000.04995.252%
3510000000.00299.776%


ECM Summary

B1B2factorcurvesGHz-days
500005000000362.501
50000500000030.208
50000750000021217.68


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00ANONYMOUSv4_computersD2F8B3527EA54A290.104
2015-07-14T15:04:00MadPooManual testingD2F8B3527EA54A290.104


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-20T20:14:03ATHec2-1xd
47908018444421046306319
EB8C0FE1076400__no
2017-12-20T21:11:42kkmrkkblmbrbkc4.xlarge
47908018444421046306319
EB8C0FE1076400__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
250
260
270
280
290
2100
Last modified: 2022-02-17T11:38:23+00:00