is 2 2390449 - 1
has 719597 decimal digits
takes 0.161 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L17787C401581F9D6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.430367.1642%30000001000000000.81158.5030%13.241869.9562%2.7920%
PrimeNet2590.032162.7119%100001700000.00182.4778%0.034063.6358%0.9239%
GPU722630.667765.0794%100001400000.00171.2738%0.669365.5242%0.4448%
Difference+4+11.7626+2.0848%+2990000+99860000+0.8099+7.2293%+12.5725+4.4320%+4.4320%

Known prime factors (1 factor, 90.1 bits, 0.00376735% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
239044912875378893324348261266579372890.057269308797077962095432
23 × 3 × 11 × 103 × 439 × 499 × 997 × 45347063
2015-11-2299745347063107,890,8770.24210.4520

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.287%
2010-11-08T11:36:00Jocelyn LaroucheManual testing1500015000---0.001--0.243%
2010-11-15T22:51:00Jocelyn LaroucheManual testing2000020000---0.002--0.311%
2010-12-25T03:18:00markrtiny1000002075000---0.020--2.731%
2014-09-15T22:12:00ANONYMOUSManual testing126850126850---0.012--1.074%
2015-11-22T00:29:39mikrMSI3000000100000000122890.0570.8120.3231.6238.503%
2018-09-28T16:25:02alpertronManual testing20000006000000012-
skipped known factor: 1287537889332434826126657937
--0.505--7.612%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-06-29T00:00:00ANONYMOUSv4_computers21258--0.016--
1999-03-01T00:00:00ANONYMOUSv4_computers21259--0.032--
2022-03-09T16:37:57LordJuliusManual testing21260--0.064--
2009-01-16T01:44:00Sturle Sundeantonov.ifi260261--0.064--
2012-06-01T20:18:00Sebastian HornbostelManual testing261262--0.129--
2013-01-23T08:27:00dbaughManual testing262263--0.411--
2015-03-10T10:44:00VictordeHollanderManual testing263264--0.821--
2015-03-10T10:44:00VictordeHollanderManual testing264265--1.563--
2015-11-02T09:33:38ramgeisManual testing265266--3.126--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.323 GHz-days
Estimated T-Level:0.800
DigitsB1CurvesCompleteFacMiss
201100016 / 1000.16085.146%
255000013 / 2800.04695.455%

New Calculation Method

Total ECM effort:1.323 GHz-days
Estimated T-Level:0.800
DigitsB1CompleteFacMiss
20110000.47062.488%
25500000.04295.882%
302500000.00399.743%


ECM Summary

B1B2factorcurvesGHz-days
5000050000030.166
500005000000131.157


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-06-29T00:00:00ANONYMOUSv4_computers17787C401581F9D60.161
1999-04-13T00:00:00ANONYMOUSv4_computers17787C401581F9D60.161


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-12T19:23:27Oliver KruseGTX-07223359B6A3ED1__no
2017-11-26T06:49:18kkmrkkblmbrbkold
1287537889332434826126657937
7223359B6A3ED1__no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 100000, B2 = 2075000 (P-1 stage 2)
B1 = 126850 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
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)
101
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105
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107
101
102
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108
TF factor-bounds graph:
267
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265
264
263
262
261
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Last modified: 2022-03-09T16:37:57+00:00