is 2 1775927 - 1
has 534608 decimal digits
takes 0.096 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L94340CC0C434BA1Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.731568.6567%500000150000000.10155.0503%16.833070.2396%1.5829%
PrimeNet2570.010863.1579%80001400000.00122.8103%0.012064.1933%1.0354%
GPU722610.173065.5738%80001200000.00111.4554%0.174166.0748%0.5010%
Difference+6+16.5585+3.0829%+492000+14880000+0.1004+3.5949%+16.6589+4.1648%+4.1648%

Known prime factors (1 factor, 83.4 bits, 0.00469571% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1775927126950483711943383056001112683.3923574203323445822465
34 × 5 × 23 × 223 × 233 × 7384746829
2013-06-0923373847468291,400,29931.64959.112

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-08T15:58:00Carsten Kossendeyleela950001615000---0.014--2.434%
2016-03-16T12:31:54alpertronManual testing5000001500000012---0.101--5.050%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.022--
2010-04-19T13:16:00Architects Cubedm1_tt260261--0.086--
2010-12-13T03:32:00GrunwalderGIMPManual testing21263--0.899--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.623 GHz-days
Estimated T-Level:24.571
DigitsB1CurvesCompleteFacMiss
2011000256 / 1002.5607.631%
2550000256 / 2800.91440.015%

New Calculation Method

Total ECM effort:17.623 GHz-days
Estimated T-Level:24.571
DigitsB1CompleteFacMiss
20110008.2580.026%
25500000.74647.409%
302500000.04695.508%
3510000000.00299.790%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000025617.62


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00ANONYMOUSv4_computers94340CC0C434BA1C0.096


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T12:57:29Oliver KruseGTX-0
12695048371194338305600111
D1380A268C2750__no
2017-11-04T12:55:01kkmrkkblmbrbkc4.xlarge
12695048371194338305600111
D1380A268C2750__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 95000, B2 = 1615000 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
263
261
258
250
260
270
280
290
2100
Last modified: 2020-10-09T08:35:31+00:00