Here is Landon with his usual green cake. On the top is the inscription,
"Chongo, 2 ¹⁹⁹³¹ -1 is prime."
That prime (discovered by a researcher at IBM) was the largest known at the time. Landon was involved in a multi-year project to discover a new largest known prime. Almost 1 year later, Landon helped break that record with the discovery of
2 ²¹⁷⁰¹ -1.
Landon is 71.5-inches high this year. He has grown a 1/2 inch. At 28 he had passed his Dad at 72.75-inches. His Dad is 71.75-inches high and his Mom is 64 inches high. His Grandmother Noll was 67 inches high and Grandfather Chase was 67 inches high.