Peter Adamson: My math fan father always sends out an email at New Year's factorizing the new year. (2025 was very interesting because it's 3ˆ4 × 5ˆ2). He says: obviously 2026 is 2x1013 and it turns out 1013 is prime! So that was quick. Despite everything I'm glad to be living in 2026 CE and not 1013 CE.

My math fan father always sends out an email at New Year's factorizing the new year. (2025 was very interesting because it's 3ˆ4 × 5ˆ2). He says: obviously 2026 is 2x1013 and it turns out 1013 is prime! So that was quick. Despite everything I'm glad to be living in 2026 CE and not 1013 CE.