is 2 2095399 - 1
has 630778 decimal digits
takes 0.138 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L841BA0F991324A14double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26714.180668.6567%25000001250000000.87468.5641%15.055271.3410%2.6843%
PrimeNet2580.018363.7931%90001600000.00162.6767%0.020064.7622%0.9691%
GPU722620.293266.1290%90001400000.00151.4010%0.294766.6036%0.4745%
Difference+5+13.8874+2.5277%+2491000+124860000+0.8731+7.1630%+14.7605+4.7374%+4.7374%

Known prime factors (1 factor, 85.6 bits, 0.00408331% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2095399570942718192103568704510572685.56213623723171388923272
23 × 31 × 11057 × 547831 × 9069017
2017-05-2654783190690176,533,5950.09650.1063

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-02-27T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.277%
2009-07-27T07:14:00harleeP4_260020000260000---0.003--1.020%
2010-12-28T23:08:00Jocelyn LaroucheManual testing3000030000---0.003--0.415%
2011-01-09T14:30:00Jocelyn LaroucheManual testing5000050000---0.005--0.596%
2011-01-22T12:29:00James HeinrichQ66001400003150000---0.029--3.129%
2016-07-28T10:34:57Jocelyn LaroucheManual testing186340630000012---0.050--3.800%
2016-11-05T16:28:43Jocelyn Larouchelow 4M223608223608---0.021--1.410%
2016-11-10T03:36:31Jocelyn Larouchelow 4M268329268329---0.026--1.540%
2017-05-26T10:23:03mikrMSI2500000125000000122685.5620.8750.2761.7498.564%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-17T00:00:00ANONYMOUSv4_computers21258--0.018--
2016-02-23T16:29:05Mark RoseManual testing258260--0.055--
2009-01-03T00:59:00Sturle Sundenardi.ifi260261--0.073--
2012-03-24T07:47:00Sebastian HornbostelManual testing261262--0.147--
2013-09-04T10:21:00ramgeisManual testing262263--0.468--
2015-04-10T15:56:00VictordeHollanderManual testing263264--0.937--
2015-04-10T15:56:00VictordeHollanderManual testing264265--1.783--
2015-10-31T16:44:14ramgeisManual testing265266--3.566--
2016-09-22T02:15:58Gordon SpenceManual testing266267--7.133--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.552 GHz-days
Estimated T-Level:1.500
DigitsB1CurvesCompleteFacMiss
201100030 / 1000.30073.970%
255000030 / 2800.10789.823%

New Calculation Method

Total ECM effort:2.552 GHz-days
Estimated T-Level:1.500
DigitsB1CompleteFacMiss
20110000.96837.994%
25500000.08791.625%
302500000.00599.463%


ECM Summary

B1B2factorcurvesGHz-days
500005000000302.552


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-07T00:00:00ANONYMOUSv4_computers841BA0F991324A140.138


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-06T22:58:37Oliver KruseGTX-0
57094271819210356870451057
B5D9DCA194A99F__no
2017-11-17T00:23:15kkmrkkblmbrbkc4.xlarge
57094271819210356870451057
B5D9DCA194A99F__no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 125000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 186340, B2 = 6300000 (P-1 stage 2)
B1 = 140000, B2 = 3150000 (P-1 stage 2)
B1 = 268329 (P-1 stage 1)
B1 = 223608 (P-1 stage 1)
B1 = 186340 (P-1 stage 1)
B1 = 140000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 20000, B2 = 260000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
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105
106
107
102
103
104
105
106
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109
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
250
260
270
280
290
2100
Last modified: 2017-11-17T00:23:15+00:00