is 2 1072943 - 1
has 322989 decimal digits
takes 0.032 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L920A8DB674C53214double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26727.693868.6567%300000100000000.03564.1016%27.729569.9423%1.2856%
PrimeNet2560.008962.5000%4500650000.00032.0169%0.009363.2563%0.7563%
GPU722600.143165.0000%4500200000.00020.6516%0.143465.2281%0.2281%
Difference+7+27.5507+3.6567%+295500+9980000+0.0354+3.4500%+27.5861+4.7142%+4.7142%

Known prime factors (2 factors, 152.8 bits, 0.01424279% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10729431318677674019572579532166.83861451431903632
24 × 3 × 229 × 631 × 8859841
2008-03-11631885984123.7500.02080.0387
1072943762711517921033222578945192685.97935542965372859193013
32 × 3949218374762132557
2020-03-099394921837476213255711,433,5119.247e+91.727e+10

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
10729431005770650400045637470084167531386656434785960747152.817
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-02-17T00:00:00Jocelyn Larouchev4_computers10000145000---0.001--0.564%
2004-04-09T00:00:00ANONYMOUSv4_computers1000002000000---0.009--2.397%
unknown30000010000000---0.036--4.102%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-07-04T00:00:00ANONYMOUSv4_computers21256--0.009--
2001-11-24T00:00:00ANONYMOUSv4_computers21257--0.018--
2003-04-03T00:00:00ANONYMOUSv4_computers21258--0.036--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.471 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000322 / 1003.2203.931%
2550000322 / 2801.15031.599%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:17.471 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.6920.000%
25500001.60920.008%
302500000.13187.737%
3510000000.00999.133%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002789.75
25000025000000132.280
25000025000000315.438


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-03-03T00:00:00ANONYMOUSv4_computers920A8DB674C532140.032


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T22:42:08Oliver KruseGTX-0
131867767401957257953
109E18F9BCC1F8__no
2017-10-18T17:50:33kkmrkkblmbrbkc4.xlarge
131867767401957257953
109E18F9BCC1F8__no
2020-03-10T09:56:38Jinyuan WangManual testing
131867767401957257953
76271151792103322257894519
460036AD82959A20no
2020-03-10T18:38:00AbsolutXTR750D
131867767401957257953
76271151792103322257894519
460036AD82959A20no


P-1 factor-bounds graph:
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 100000, B2 = 2000000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 10000, B2 = 145000 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
TF factor-bounds graph:
267
258
257
256
250
260
270
280
290
2100
Last modified: 2020-03-10T18:38:00+00:00