/podcasts/wbu54.mp3

In this month’s installment of Wrong, But Useful, Colin and Dave are joined by mathematical editor and proofreader @samhartburn.

We apologise for the sound quality. We’ve done the best we can.

• Sam enjoys @robeastaway’s Maths On The Go with her primary-school children.
• Dave plugs Colin’s books. It takes us some time to recover from the shock.
• Number of the podcast: $10^{6400} - 10^{6352} - 1$, a prime number consisting of 6,399 nines and an eight. Colin mentions the idea of Trinity Hall primes, although not by name.
• Sam asked for ideas about what makes a good textbook - Dave has some.
• The 2018 Mathical prizes for mathematical children’s books have been announced:
• Colin has a “$\pi$” day rant. Nobody writes a date as 3.14. We write it as 14/3, which is about 4.67, Feigenbaum’s constant.
• Dave liked Colin’s line: “Complex numbers are all fun and games until someone loses an $i$”.