Add new comment


Unless something has changed very recently, the question of whether there are an infinite number of twin prime pairs remains open. It's been proved that there are an infinite number of prime pair differing by less than 246.

Filtered HTML

  • Web page addresses and email addresses turn into links automatically.
  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <code> <ul type> <ol start type> <li> <dl> <dt> <dd>
  • Lines and paragraphs break automatically.
  • Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words.