is 2 1900429 - 1
has 572087 decimal digits
takes 0.103 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB25C007A206028E4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.635468.6567%80000003200000001.966510.4631%17.601871.9362%3.2795%
PrimeNet2570.010163.1579%90001600000.00143.0381%0.011564.2772%1.1193%
GPU722610.161665.5738%100001600000.00141.7274%0.163166.1685%0.5947%
Difference+6+15.4737+3.0829%+7990000+319840000+1.9650+8.7357%+17.4388+5.7677%+5.7677%

Known prime factors (1 factor, 85.7 bits, 0.00451095% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1900429640512401929577849581788732685.72716851784568894124684
22 × 3 × 19 × 277 × 104243 × 2559672373
2018-08-2710424325596723737,410,94310.97820.489

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-08-03T00:00:00Jocelyn Larouchev4_computers25000343750---0.003--1.169%
2011-02-07T12:47:00Carsten Kossendeyleela1050001785000---0.015--2.568%
2011-06-08T04:13:00kurlykk100000030000000---0.203--6.218%
2017-11-20T13:39:51mikrS064800000032000000012---1.966--10.463%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-02-05T00:00:00GrunwalderGIMPv4_computers21256--0.005--
2011-02-05T00:00:00GrunwalderGIMPv4_computers256257--0.005--
2001-12-22T00:00:00Jocelyn Larouchev4_computers21258--0.020--
2011-02-05T00:00:00GrunwalderGIMPv4_computers257258--0.010--
2011-02-05T00:00:00GrunwalderGIMPv4_computers258259--0.020--
2011-02-05T00:00:00GrunwalderGIMPv4_computers259260--0.040--
2011-02-05T00:00:00GrunwalderGIMPv4_computers260261--0.081--
2009-05-23T21:55:00Architects Cubedi4l_1260261--0.081--
2011-01-07T18:22:00GrunwalderGIMPGWPrime02261262--0.162--
2011-01-07T21:52:00GrunwalderGIMPGWPrime02262263--0.517--
2015-05-19T06:11:00omylistManual testing263264--1.033--
2015-05-19T06:11:00omylistManual testing264265--1.966--
2015-08-30T20:42:00ramgeisManual testing265266--3.932--
2017-03-02T09:39:39Smok_bmvManual testing266267--7.864--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.252 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:19.252 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.5570.019%
25500000.77546.063%
302500000.04895.319%
3510000000.00299.780%


ECM Summary

B1B2factorcurvesGHz-days
500005000000422.913
50000500000020.139
50000660000020716.20


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29T00:00:00ANONYMOUSv4_computersB25C007A206028E40.103
2015-07-14T15:04:00MadPooManual testingB25C007A206028E40.103


PRP results:
dateuseridcompidcofactorsres64PRP
2018-08-28T12:13:24_p95holder_b_PRPt11_TFL7_E-
64051240192957784958178873
ECBC1790F8EB0A__no
2018-08-31T12:56:27ANONYMOUSdory
64051240192957784958178873
ECBC1790F8EB0A__no


P-1 factor-bounds graph:
B1 = 8000000, B2 = 320000000 (P-1 stage 2)
B1 = 8000000 (P-1 stage 1)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 105000, B2 = 1785000 (P-1 stage 2)
B1 = 105000 (P-1 stage 1)
B1 = 25000, B2 = 343750 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
266
265
264
263
262
261
260
259
258
257
256
250
260
270
280
290
2100
Last modified: 2021-12-17T10:36:27+00:00