is 2 4483891 - 1
has 1349786 decimal digits
takes 0.559 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 L-L tests remaining
ResidueStatus
L-L4D545E7E32FC4987double-checked
PRPB58F702AD829183E

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual271106.621367.6056%107127895216071276.97129.1776%113.592670.5787%2.9730%
PrimeNet2610.068562.2951%190004000000.00723.0624%0.075763.4498%1.1547%
GPU722651.627164.6154%260005500000.00992.0897%1.637065.3548%0.7394%
Difference+6+104.9942+2.9902%+10686789+521057127+6.9614+7.0879%+111.9556+5.2238%+5.2238%

Known prime factors (1 factor, 122.4 bits, 0.00273086% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4483891725690139672203477191879300959117180137122.449809219202331416483130253724900
22 × 3 × 52 × 1597 × 115237 × 183713 × 213833 × 373107043
2021-08-262138333731070434.146e+103.71286.8662

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-01-08T00:00:00arnaudv4_computers20000155000---0.005--0.540%
2010-08-27T17:30:00markrtiny950002113750---0.037--1.847%
2016-12-26T00:14:34mikrMSI18000006800000012---0.978--5.842%
2021-08-26T07:55:40LaurVManual testing1071278952160712737122.4496.9711.11813.949.178%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-15T00:00:00ANONYMOUSv4_computers?261--0.034--
2010-09-30T01:42:00markroldgamer261262--0.069--
2012-02-10T17:49:00GrunwalderGIMPManual testing21263--0.356--
2016-02-23T16:38:52Mark RoseManual testing262263--0.219--
2014-09-29T20:36:00JayderManual testing263264--0.438--
2014-09-30T11:40:00monstManual testing264265--0.833--
2015-06-26T22:24:00snme2pm1Manual testing265266--1.667--
2018-06-24T21:14:47ramgeisManual testing266267--3.333--
2018-06-24T21:14:47ramgeisManual testing267268--6.666--
2021-06-21T08:52:22TJAOIManual testing268269--13.33--
2021-07-29T10:35:32axnManual testing269270--26.67--
2021-08-09T19:16:06SRBaseManual testing270271--53.33--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.662 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.662 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.29074.802%
25500000.02697.410%
302500000.00299.839%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.662


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-10-07T00:00:00Net_Forcev4_computers4D545E7E32FC49870.559
2001-04-15T00:00:00arnaudv4_computers4D545E7E32FC49870.559


PRP results:
dateuseridcompidcofactorsres64PRP
2021-08-28T01:33:21LaurVtrabi
7256901396722034771918793009591171801
B58F702AD829183Eno


P-1 factor-bounds graph:
B1 = 10712789, B2 = 521607127 (P-1 stage 2)
B1 = 10712789 (P-1 stage 1)
B1 = 1800000, B2 = 68000000 (P-1 stage 2)
B1 = 1800000 (P-1 stage 1)
B1 = 95000, B2 = 2113750 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 20000, B2 = 155000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
107
108
103
104
105
106
107
108
109
TF factor-bounds graph:
271
270
269
268
267
266
265
264
263
262
261
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2021-08-28T01:33:21+00:00