is 2 4030357 - 1
has 1213259 decimal digits
takes 0.503 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LE5D6BFEA498AC993double-checked
PRPC433444B58569D23

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27059.287768.5714%2189464634944581.00006.3382%60.287770.5634%6.6290%
PrimeNet2610.076263.9344%160003200000.00592.7316%0.082164.9196%0.9852%
GPU722651.810266.1538%220003600000.00731.7516%1.817566.7467%0.5928%
Difference+5+57.4775+2.4176%+2167464+63134458+0.9927+4.5866%+58.4702+3.8167%+3.8167%

Known prime factors (1 factor, 78.0 bits, 0.00193590% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
40303573072559073123762826079432478.02438117703631759703
7 × 109 × 272381 × 183411001
2021-06-0927238118341100124,1411.85373.3753

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-11-25T18:22:00harleeP4_260040000610000---0.013--1.191%
2013-06-29T02:15:00Squeeky_SquirrelP4_26001200002310000---0.043--2.204%
2016-11-20T03:12:00Ismo Laitela6600K21894646349445812---1.000--6.338%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-06-09T02:37:55ATH5960X250000017750000027P+12478.0242.096


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-07-29T00:00:00ANONYMOUSv4_computers?261--0.038--
2009-11-14T22:59:00GrunwalderGIMPManual testing21263--0.396--
2016-02-23T16:29:46Mark RoseManual testing261263--0.320--
2013-08-07T06:40:00JayderManual testing263264--0.487--
2013-11-18T12:55:00David CampeauManual testing264265--0.927--
2015-05-19T21:13:00snme2pm1Manual testing265266--1.854--
2016-09-06T07:51:29kkmrkkblmbrbkManual testing266267--3.708--
2018-10-17T16:45:20mikrManual testing267268--7.416--
2018-10-18T10:28:24YxinityManual testing267268--7.416--
2020-01-17T18:10:25mikrManual testing268269--14.83--
2020-01-17T18:10:25mikrManual testing269270--29.67--


ECM factoring results:
Total ECM effort:2.163 GHz-days
Estimated T-Level:0.600
DigitsB1CurvesCompleteFacMiss
201100012 / 1000.12088.638%
255000012 / 2800.04395.797%

ECM Summary

B1B2factorcurvesGHz-days
500005000000122.163


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-11-04T00:00:00Stephan Gruppv4_computersE5D6BFEA498AC9930.503


PRP results:
dateuseridcompidcofactorsres64PRP
2021-06-10T17:39:59kutensterra
307255907312376282607943
C433444B58569D23no


P-1 factor-bounds graph:
B1 = 2189464, B2 = 63494458 (stage 2)
B1 = 2189464 (stage 1)
B1 = 120000, B2 = 2310000 (stage 2)
B1 = 120000 (stage 1)
B1 = 40000, B2 = 610000 (stage 2)
B1 = 40000 (stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
270
269
268
267
266
265
264
263
261
250
260
270
280
290
2100
Last modified: 2021-06-10T17:39:59+00:00