RPS Drive 5

• Name: Riesel Prime Search Drive 5
• Purpose: The goal of this drive is to search for primes of the form k•2ⁿ-1 for k ≤ 300 where k divisible by 3 and n > 260000.
• Link: Mersenne Forum
• Started: 2006-11-12
• Ended: 2008-07-04
• k-values:

2006-11-12: k = 51, 57, 117, 129, 135, 213, 237, 249, 261, 267, 273, 279, 285, 291. See n-values by k in Data table below.

2008-01-03: removing k = 51, 57 for n > 870000

• n-values: 260000 ≤ n ≤ 1000000

Data table

k-value	Nash	n-range	prime(s) for n (confirmed)
51	1550	475000-870000	657705, 832630, 845494
57	2672	400000-870000	450430, 565994, 707245, 839446
117	3581	438000-1000000	511361, 560848, 697458, 834916, 877874
129	2753	398000-1000000	398288, 536615, 603488, 690893
135	2322	300000-1000000	437544, 474178, 525544, 876997, 959059, 961897
213	2538	260000-1000000	303670, 709727, 760942
237	2404	260000-1000000	421862, 729654, 832053
249	1592	260000-1000000
261	2394	260000-1000000	618918, 660709, 802123, 827599, 850383
267	2205	300000-1000000	415916, 471230, 607688, 662524, 705028
273	3029	260000-1000000	522287, 742930, 930663
279	2345	260000-1000000	277455, 318317, 455704, 479437, 587881, 616044
285	3331	470000-1000000	780300, 881240, 915913
291	1969	260000-1000000	291705, 313433, 372342, 386430, 389225, 531347, 565917, 810347, 832410, 934097, 996371

Range history

Riesel Prime Search

Miscellaneous

Main

Current work

Megabit Drive‎ 1

Completed

Drive 1 Drive 2 Drive 3 Drive 4 Drive 5 Drive 6 Drive 7 Drive 8 Drive 9 Drive 10 Drive 11 Drive 12 Megabit Drive‎ 2 Megabit Drive‎ 3

Individual k-searches

k=5 k=15 k=17

Others