is 2 1338299 - 1
has 402869 decimal digits
takes 0.051 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LDDC3D21C0D110E5Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26722.202768.6567%500000150000000.07144.8805%22.274270.1864%1.5297%
PrimeNet2560.007262.5000%60001000000.00062.6085%0.007863.4782%0.9782%
GPU722600.114865.0000%5500400000.00040.9797%0.115265.3429%0.3429%
Difference+7+22.0880+3.6567%+494500+14960000+0.0710+3.9008%+22.1590+4.8435%+4.8435%

Known prime factors (1 factor, 98.0 bits, 0.00732034% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
13382993099694035562631521407448746313097.968115807231252606163548185
32 × 5 × 47 × 73 × 149 × 6449 × 473839 × 1647377
2014-07-1147383916473774.508e+100.02980.0534

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00Team Prime Ribv4_computers15000217500---0.001--0.796%
2014-04-27T11:48:00ANONYMOUSManual testing175000175000---0.010--1.154%
2014-07-11T23:54:00mikrMSI500000150000003097.9680.0710.1020.1434.881%
2016-03-17T19:05:11alpertronManual testing5000001500000012-
skipped known factor: 309969403556263152140744874631
--0.071--4.881%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-04T00:00:00ANONYMOUSv4_computers21257--0.014--
2003-06-30T00:00:00ANONYMOUSv4_computers21258--0.029--
2022-03-07T17:32:34LordJuliusManual testing258260--0.086--
2009-02-18T03:40:00Sturle Sundeghirardelli.ifi260261--0.115--
2012-09-18T03:28:00AxelssonManual testing261262--0.230--
2013-01-14T11:53:00dbaughManual testing262263--0.734--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.164 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.164 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.35725.749%
302500000.11389.315%
3510000000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025111.72
250000350000005013.44


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2010-03-17T00:00:00Bruce A Metcalfv4_computersDDC3D21C0D110E5D0.051


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T05:34:43Oliver KruseGTX-3
309969403556263152140744874631
7059EDE9531EEA__no
2017-10-24T03:12:31kkmrkkblmbrbkc4.xlarge
309969403556263152140744874631
7059EDE9531EEA__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 175000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
267
263
262
261
260
258
257
250
260
270
280
290
2100
Last modified: 2022-03-07T17:32:34+00:00