decompwlj 3D

Numbers k such that 1009*k + 9973 is prime

A105680 on the OEIS · family prime values

Weight–level plate of Numbers k such that 1009*k + 9973 is prime
Click the plate to explore it in 3-D. Weight k across, level L up, both on log scales: blue in the weight class (k ≤ L), orange in the level class (k > L). The dashed diagonal is k = L.
Open in the 3-D viewerA105680 on the OEIS
Terms100,000 (n = 1 … 100,000)
Decomposable (a > 2d)99,995
Level class, k > L24,771 · 24.77 %
Weight class, k ≤ L75,224 · 75.23 %
Ties, k = L0
On the level line L = 10
Forced level, l ≤ d²23
Range of a(n)0 … 2,041,332
Range of the jump d2 … 222
Largest weight k, level L1,020,619, 510,332

86 different gaps occur, from 2 to 222; the level share is 24.77 %; L = 2 holds 38 % of the level class; there are no ties.

The decomposition

Every term of a strictly increasing sequence is written a(n) = k(n)·L(n) + d(n): the jump d = a(n+1) − a(n), the weight k the least divisor of a − d greater than d, the level L = (a − d)/k. A term decomposes when a > 2d; it is in the level class when k > L and in the weight class when k ≤ L. See decompwlj.com and arXiv:0711.0865, or how it works, with worked examples and a live one.