But the largest prime factor of the next number in the sequence — 586,034,235,924,737 — is just 89. It’s these exceptions that make the problem hard. In the mid-1930s, Sarvadaman Chowla and Kurt ...

Technology Computer made of DNA works out prime factors of 6 and 15. Simple calculations, such as factoring low numbers, can be made by mixing together differently shaped strands of DNA ...