“The rule for working out prime numbers is very simple, but no one has ever worked out a simple formula for telling you whether a very big number is a prime number or what the next one will be. […] Prime numbers is what is left when you have taken all the patterns away. I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them.”

“Prime numbers are what is left when you have taken all the patterns away. I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them.”

“I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them”

“Prime numbers are useful for writing codes and in America they are classed as Military Material and if you find one over 100 digits you have to tell the CIA and they buy it off you for $10,000. But it would not be a very good way of making a living.”

“Usually people look at you when they're talking to you. I know that they're working out what I'm thinking, but I can't tell what they're thinking. It is like being in a room with a one-way mirror in a spy film.”

“I imagine John Watson thinks love’s a mystery to me, but the chemistry is incredibly simple and very destructive. When we first met, you told me that a disguise is always a self portrait, how true of you, the combination to your safe – your measurements. But this is far more intimate. This is your heart, and you should never let it rule your head. You could have chosen any random number and walked out of here today with everything you worked for. But you just couldn’t resist it, could you? I’ve always assumed that love is a dangerous disadvantage. Thank you for the final proof.”

“He treated Root exactly as he treated prime numbers. For him, primes were the base on which all other natural numbers relied; and children were the foundation of everything worthwhile in the adult world”