RNGdle

ABAB & ABCABC Patterns

Numbers with a chorus that repeats.

What is it?

ABAB numbers alternate two digits all the way through — 1212, 565656. ABCABC numbers repeat a whole three-digit block — 456456, 123123. Both are the musical hooks of the number world: a pattern you can hum.

  • Exact matches1,071
  • Odds1 in 934
  • Out of1,000,001

How it scores

ABAB needs an even length of 4+ digits; ABCABC needs exactly six. Both are rare — ABCABC especially, since only 1,000 blocks exist to repeat — so they earn strong scores.

The formula: -log2(count / 1,000,001) bits per trait, capped at 20, summed with 0.5 decay per additional trait.

Highest-scoring abab & abcabc patterns

  1. 999,999score 32.7 · Mythic
  2. 111,111score 26.1 · Mythic
  3. 888,888score 26.1 · Mythic
  4. 1,111score 25.8 · Mythic
  5. 222,222score 25.8 · Mythic
  6. 333,333score 25.8 · Mythic
  7. 666,666score 25.8 · Mythic
  8. 777,777score 25.8 · Mythic
  9. 444,444score 25.7 · Mythic
  10. 555,555score 25.7 · Mythic

Related patterns

FAQ

Is 999999 an ABAB number?

Yes — A and B can be the same digit, so repdigits qualify as ABAB too (and as ABCABC). Lucky rolls stack.

Why exactly six digits for ABCABC?

The range stops at 1,000,000, so a twice-repeated three-digit block is the only block-repeat that fits.

What is the most famous ABCABC number?

142857 doubled is 285714 — it is cyclic rather than repeated, but 123123 and 456456 are crowd favorites.