is 2 1749439 - 1
has 526634 decimal digits
takes 0.095 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LFFB1CDAF7667706Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.984868.6567%36422001234567890.80008.6353%17.784871.3633%2.7066%
PrimeNet2570.011063.1579%80001400000.00122.8023%0.012264.1903%1.0324%
GPU722610.175665.5738%80001100000.00111.4126%0.176766.0601%0.4863%
Difference+6+16.8092+3.0829%+3634200+123346789+0.7989+7.2227%+17.6082+5.3032%+5.3032%

Known prime factors (2 factors, 166.1 bits, 0.00949709% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17494391292347248352244478175932476.77436936047737367364
22 × 3 × 3301 × 932445918847
2020-07-06330193244591884714,8153,996.27,463.8
17494398007072625948565502766859772789.371228846865365084621492
22 × 32 × 97 × 5003 × 329657 × 39735431
2015-06-2232965739735431110,939,5710.19480.3181

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
174943910347918275501209135892513606815464164284623699336
1
51166.146
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:41:00Carsten Kossendeyleela950001543750---0.014--2.401%
2014-04-08T23:00:00Jocelyn LaroucheManual testing100000100000---0.008--0.887%
2014-05-06T10:53:00Jocelyn LaroucheManual testing136688136688---0.011--1.059%
2014-09-15T22:12:00ANONYMOUSManual testing173376173376---0.014--1.202%
2015-04-22T02:02:00Squeeky_SquirrelP4_26001300003640000---0.025--3.107%
2015-06-22T19:28:00mikrMSI3642200123456789122789.3710.8000.1901.6008.635%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00carlo_baffav4_computers21257--0.011--
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.022--
2010-04-23T13:38:00Architects Cubedm1_fw260261--0.088--
2010-12-13T03:32:00GrunwalderGIMPManual testing21263--0.912--
2015-05-13T05:09:00snme2pm1Manual testing263264--1.122--
2015-05-13T05:09:00snme2pm1Manual testing264265--2.136--


ECM factoring results:

Old Calculation Method

Total ECM effort:20.893 GHz-days
DigitsB1CurvesCompleteFacMiss
2011000304 / 1003.0404.711%
2550000304 / 2801.08633.700%

New Calculation Method

Total ECM effort:20.893 GHz-days
DigitsB1CompleteFacMiss
20110009.8060.006%
25500000.88641.218%
302500000.05594.688%
3510000000.00299.750%


ECM Summary

B1B2factorcurvesGHz-days
50000500000022815.67
500005000000765.223


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-06T00:00:00carlo_baffav4_computersFFB1CDAF7667706B0.095


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:24:43alpertronManual testing
800707262594856550276685977
994499E171B95C__no
2017-10-19T16:05:00Oliver KruseThreadripper
800707262594856550276685977
994499E171B95C__no
2020-07-06T13:51:49mrh.orgw
129234724835224447817593
800707262594856550276685977
FDBED91387456805no
2020-07-08T10:37:30oodairacom1
129234724835224447817593
800707262594856550276685977
FDBED91387456805no


P-1 factor-bounds graph:
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 130000, B2 = 3640000 (P-1 stage 2)
B1 = 95000, B2 = 1543750 (P-1 stage 2)
B1 = 173376 (P-1 stage 1)
B1 = 136688 (P-1 stage 1)
B1 = 130000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-07-08T10:37:30+00:00