is 256815867-1
has 17,103,281 decimal digits
takes 120.418 GHz-days to do one L-L test
Last-known PrimeNet details:
1 L-L tests remaining
ResidueStatus
L-L3BA60475DDAEF6__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27333.667464.3836%1,000,00020,000,0006.25454.9156%39.921969.2992%6.9803%
PrimeNet2692.101362.3188%240,00011,000,0002.53925.4702%4.640567.7891%5.4702%
GPU7227333.667464.3836%400,00013,000,0003.33904.0668%37.006468.4503%4.0668%
Difference---+600,000+7,000,000+2.9155+0.8488%+2.9155+0.8488%+0.8488%

Known prime factors (1 factor, 122.9 bits, 0.00021627% known):
Remaining cofactor is PRP status unknown

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
56815867976765491704427616306646353562133408137122.87785958865302929163811461889120
25 × 3 × 5 × 7 × 17 × 751 × 5689 × 210461 × 492047 × 3401327
492,0473,401,3272018-02-103.287e+91.99933.0775

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-20T06:06:00SDB2012695,000695,000---2.136--1.906%
2018-02-10T21:34:16Sid & AndyRocky1,000,00020,000,000637122.8776.254240.812.514.916%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-23T00:00:00ANONYMOUSv4_computers?253--2.11195e-5--
2000-01-19T00:00:00ANONYMOUSv4_computers?253--2.11195e-5--
2000-03-08T00:00:00ANONYMOUSv4_computers?254--4.22390e-5--
2000-06-28T00:00:00ANONYMOUSv4_computers?256--0.000--
2000-06-29T00:00:00ANONYMOUSv4_computers?256--0.000--
2001-09-30T00:00:00ANONYMOUSv4_computers?257--0.000--
2002-11-09T00:00:00ANONYMOUSv4_computers?258--0.001--
2016-02-23T16:40:40Mark RoseManual testing258263--0.027--
2008-08-12T23:50:00James HeinrichQ6600263264--0.035--
2008-08-15T10:05:00Sturle Sundeiago.ifi264265--0.066--
2008-08-16T05:54:00Sturle Sundeiago.ifi265266--0.132--
2008-08-16T17:59:00Sturle Sundeiago.ifi266267--0.263--
2009-05-21T22:03:00DigiK-ozBacchus267268--0.526--
2011-04-18T06:23:00dslshadow268269--1.052--
2011-06-09T21:30:00ANONYMOUS269270--2.104--
2012-02-19T08:43:00ANONYMOUSManual testing270271--4.209--
2012-02-19T08:43:00ANONYMOUSManual testing271272--8.418--
2016-01-09T03:04:13ANONYMOUSManual testing272273--16.84--


ECM factoring results:
Exponent "56815867" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2012-08-13T08:33:00lov4iyDC023BA60475DDAEF6__120.4


PRP results:
Exponent "56815867" not found


P-1 factor-bounds graph:
B1 = 1,000,000, B2 = 20,000,000 (stage 2)
B1 = 1,000,000 (stage 1)
B1 = 695,000 (stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
273
272
271
270
269
268
267
266
265
264
263
258
257
256
254
253
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2018-02-10T21:34:16+00:00