Math · 3

Which 19th-century French mathematician first conjectured in 1849 that infinitely many twin primes exist?

Answer

Alphonse de Polignac

In 1849, Alphonse de Polignac proposed that for every even number k there are infinitely many prime pairs differing by k; setting k=2 gives the twin prime conjecture still unproven today.

💡 Did you know?

Twin primes (pairs differing by 2, like 11 and 13) appear to exist infinitely often, yet mathematicians still cannot prove it after 170+ years of trying.

Other options people guess

  • Évariste Galois
  • Joseph Fourier
  • Augustin-Louis Cauchy

Topics

  • primes
  • conjectures
  • history-of-math
  • number-theory

Know your math trivia?

Play a free Math quiz and see how many you get right — no signup needed to start.

More Math facts

Math

What does Goldbach's Conjecture claim is true of every even number greater than 2?

Goldbach's Conjecture—every even number above 2 is a sum of two primes—passed computer checks through 4×10^18, but a proof eludes all methods.

Math

As of ongoing computer verification, up to roughly what value has Goldbach's Conjecture been confirmed with no exceptions found?

Goldbach's Conjecture—every even number above 2 is a sum of two primes—passed computer checks through 4×10^18, but a proof eludes all methods.

Math

Which of these prime number pairs qualifies as 'twin primes' because they differ by exactly two?

Twin primes (pairs differing by 2, like 11 and 13) appear to exist infinitely often, yet mathematicians still cannot prove it after 170+ years of trying.

Math

According to historians, the Babylonians' habit of never writing zero at the end of a number caused lasting ambiguity in which field of study?

The Babylonians used zero around 300 BCE but only in the middle of numbers, never at the end—creating ambiguity that plagued astronomy for centuries.

Math

After decades of scrutiny, what did mathematicians ultimately conclude about the nested-radical pi formula Ramanujan discovered while feverish?

Ramanujan discovered a formula for pi containing infinite nested radicals while fevered and ill, verified decades later as mathematically sound.

Math

In Fibonacci's 1202 math textbook, which animal's breeding problem accidentally produced the famous number sequence bearing his name?

A medieval Italian merchant's math textbook accidentally created one of history's most famous sequences—Fibonacci's rabbit problem was likely just a random example, not intentionally profound.