decompwlj 3D

Primes congruent to 23 mod 43

A142272 on the OEIS · family primes

Weight–level plate of Primes congruent to 23 mod 43
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 viewerA142272 on the OEIS
Terms100,000 (n = 1 … 100,000)
Decomposable (a > 2d)99,996
Level class, k > L50,538 · 50.54 %
Weight class, k ≤ L49,458 · 49.46 %
Ties, k = L8
On the level line L = 16,239
Forced level, l ≤ d²1,080
Range of a(n)23 … 71,457,853
Range of the jump d86 … 8,170
Largest weight k, level L71,453,639, 821,151

68 different gaps occur, from 86 to 8,170; the level share is 50.54 %; 1.1 % of terms are forced level (l <= d^2).

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.