is 2 2453483 - 1
has 738572 decimal digits
takes 0.170 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L05370A6F5FFD1E04double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26824.294067.6471%3102822434395080.53316.8551%24.827169.8649%2.2178%
PrimeNet2590.031362.7119%100001800000.00192.5289%0.033263.6549%0.9430%
GPU722630.650565.0794%100001600000.00181.3337%0.652365.5451%0.4658%
Difference+5+23.6435+2.5677%+3092822+43279508+0.5313+5.5214%+24.1747+4.3198%+4.3198%

Known prime factors (1 factor, 95.3 bits, 0.00388449% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2453483489474003981248981141184826392995.3059975084481556403307893
32 × 1108342720172933700877
2020-09-07911083427201729337008773.506e+96.073e+121.134e+13

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.234%
2003-10-31T00:00:00Team Prime Ribv4_computers15000232500---0.003--0.788%
2010-12-22T11:37:00Jocelyn LaroucheManual testing2000020000---0.002--0.262%
2011-01-19T20:57:00Oscar Östlin950001947500---0.020--2.374%
2014-02-09T03:17:00mikrMSI310282243439508---0.533--6.855%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-08-07T00:00:00ANONYMOUSv4_computers21259--0.031--
2016-02-23T16:29:14Mark RoseManual testing259260--0.031--
2009-01-15T19:43:00Sturle Sundeczerny.ifi260261--0.063--
2012-06-07T11:43:00Sebastian HornbostelManual testing261262--0.125--
2013-12-04T21:13:00Jerry HallettManual testing262263--0.400--
2015-03-03T21:37:00VictordeHollanderManual testing263264--0.800--
2015-03-03T21:37:00VictordeHollanderManual testing264265--1.523--
2015-10-25T20:35:05ramgeisManual testing265266--3.046--
2017-07-14T10:08:13Gordon SpenceManual testing266267--6.092--
2019-07-17T09:51:52TJAOIManual testing267268--12.18--


ECM factoring results:

Old Calculation Method

Total ECM effort:7.060 GHz-days
Estimated T-Level:3.850
DigitsB1CurvesCompleteFacMiss
201100077 / 1000.77046.122%
255000077 / 2800.27575.920%

New Calculation Method

Total ECM effort:7.060 GHz-days
Estimated T-Level:3.850
DigitsB1CompleteFacMiss
20110002.4848.342%
25500000.22479.892%
302500000.01498.627%


ECM Summary

B1B2factorcurvesGHz-days
500005000000726.601
50000500000050.458


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-14T22:45:00MadPooManual testing05370A6F5FFD1E040.170


PRP results:
dateuseridcompidcofactorsres64PRP
2020-09-08T17:36:24Yuji HASEGAWAvj20a
48947400398124898114118482639
CD5EE9A0C0B8A910no
2020-09-09T22:31:16krackercore
48947400398124898114118482639
CD5EE9A0C0B8A910no


P-1 factor-bounds graph:
B1 = 3102822, B2 = 43439508 (P-1 stage 2)
B1 = 3102822 (P-1 stage 1)
B1 = 95000, B2 = 1947500 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 15000, B2 = 232500 (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)
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TF factor-bounds graph:
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Last modified: 2020-09-09T22:31:16+00:00