PRIME FIND

Maths fanatic Jonathan Pace, 51, has found the world’s largest prime number after a 14-year search. Dubbed M77232917, the prime – a number greater than one that is only divisible by one and itself – comprises 23,249,425 digits. If printed in full with one-millimetre digits, it would stretch the length of more than 1500 London buses. The figure is nearly one million digits longer than the previous world’s longest prime, discovered in January 2016. Pace is set to receive a $3000 reward for his find.