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NPLB K300 Drive 2

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Overview

NPLB K300 Drive 2 - Ongoing
Project No Prime Left Behind
Drive name NPLB K300 Drive 2
Purpose Search for Riesel primes for many k's < 100 and n = 3000000 - 4000000
Current status Multi Reservation 4: The current nmax = 3,500,000 as of 2025-07-12
Date start 2025-02-27
k-values 35 - 95
n-range 3000000 - 4000000
Link Thread at MersenneForum

k-history

2025-02-27: k = 73, 75, 77, 85, 91, 93, 95
2025-03-12: added k = 35, 37, 47, 53, 57, 61, 65, 87 at n = 3100000
2025-05-03: added k = 81 at n = 3200000
2025-06-05: added k = 59 at n = 3400000
2025-07-12: added k = 55, 67 at n = 3500000
currently k = 35, 37, 47, 53-61, 65, 67, 73-77, 81, 85, 87, 91-95

n-history

Sieve history

Reservation history

Primes table

The data file can be found here.

k-value Nash Candidates n-range # primes prime(s) for n (C=confirmed)

35 1264 3100000- 0
37 630 3100000- 0
47 922 3100000- 0
53 1368 3100000- 0
55 2113 3500000- 0
57 2672 3100000- 0
59 639 3400000- 0
61 2170 3100000- 0
65 2034 3100000- 0
67 829 3500000- 0
73 800 3000000- 0
75 3181 3000000- 0
77 1700 3000000- 0
81 1698 3200000- 0
85 921 3000000- 0
87 2839 3100000- 0
91 2374 3000000- 0
93 2149 3000000- 0
95 1490 3000000- 0

Notes

No Prime Left Behind
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