is 2 5026093 - 1
has 1513005 decimal digits
takes 0.697 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L489D0C7648F10E71double-checked
PRP1DC187C4C0B4001Bverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual273380.582868.4932%560000313600000.44983.7183%381.032669.6647%1.1715%
PrimeNet2610.061162.2951%220004500000.00913.3161%0.070263.5454%1.2503%
GPU722651.451664.6154%340007000000.01412.4181%1.465765.4710%0.8556%
Difference+8+379.1312+3.8778%+526000+30660000+0.4357+1.3001%+379.5669+4.1936%+4.1936%

Known prime factors (1 factor, 77.4 bits, 0.00154083% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
50260932054964783731833386733272477.44320442964184425491
3 × 1093 × 2069191 × 3013019
2021-10-202069191301301911,6930.42620.8464

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-05-24T00:00:00ANONYMOUSv4_computers25000231250---0.007--0.506%
2000-08-17T00:00:00ANONYMOUSv4_computers25000281250---0.008--0.540%
2009-08-07T16:09:00harleeP4_260055000907500---0.020--1.006%
2014-11-14T01:20:00Jocelyn LaroucheManual testing6777067770---0.014--0.348%
2017-02-15T11:04:41Squeeky_Squirreli5-5250U_1600300000937500012---0.160--2.645%
2021-04-04T11:32:21Dylan Delgadodesktoplinux56000031360000---0.450--3.718%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-10-20T13:18:49ATH5960X25000009000000027P-12477.4431.703


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:39:07Mark RoseManual testing21263--0.318--
2014-12-15T11:36:00VictordeHollanderManual testing263264--0.391--
2014-12-15T11:36:00VictordeHollanderManual testing264265--0.743--
2015-07-27T22:27:00snme2pm1Manual testing265266--1.487--
2016-05-16T02:24:42Gordon SpenceManual testing266267--2.974--
2018-06-07T09:02:32ramgeisManual testing267268--5.947--
2021-02-01T12:43:25TJAOIManual testing268269--11.89--
2021-04-01T23:56:56-Anonymous-Manual testing269270--23.79--
2021-04-01T23:56:56-Anonymous-Manual testing270271--47.58--
2021-04-04T01:06:50-Anonymous-Manual testing271272--95.15--
2021-04-04T23:55:43-Anonymous-Manual testing272273--190.3--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.897 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.897 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.29074.802%
25500000.02697.410%
302500000.00299.839%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.897


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13T00:00:00Nayan Hajratwalav4_computers489D0C7648F10E710.697
2000-08-31T00:00:00ANONYMOUSv4_computers489D0C7648F10E710.697


PRP results:
dateuseridcompidcofactorsres64PRP
2021-10-20T17:15:01ATHec2-PRPCF
205496478373183338673327
1DC187C4C0B4001Bno


P-1 factor-bounds graph:
B1 = 2500000, B2 = 90000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 560000, B2 = 31360000 (P-1 stage 2)
B1 = 300000, B2 = 9375000 (P-1 stage 2)
B1 = 560000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 55000, B2 = 907500 (P-1 stage 2)
B1 = 67770 (P-1 stage 1)
B1 = 55000 (P-1 stage 1)
B1 = 25000, B2 = 281250 (P-1 stage 2)
B1 = 25000, B2 = 231250 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-10-20T17:15:01+00:00