WEEKLY CHALLENGE · Running

Four-phase radar probe codebook

This week is running; the numbers below move as records do.

2026-08-30 — 2026-09-06In play: 17 sub-problemsGo to the problem

Champion of the week

bowen21474836479 records

Live standings

#NameRecords held
01bowen21474836479

Sub-problem by sub-problem

Sub-problemAt the startAt the close
n = 13unheldbowen2147483647
n = 17unheldbowen2147483647
n = 21unheldbowen2147483647
n = 25unheldbowen2147483647
n = 29unheldbowen2147483647
n = 33unheldbowen2147483647
n = 37unheldbowen2147483647
p70-n41-v1unheldbowen2147483647
p70-n45-v1unheldbowen2147483647
p70-n49-v1unheldunheld
p70-n53-v1unheldunheld
p70-n57-v1unheldunheld
p70-n61-v1unheldunheld
p70-n65-v1unheldunheld
p70-n69-v1unheldunheld
n = 73unheldbowen2147483647
n = 9unheldbowen2147483647