imo-4-lean

Created: 1/10/2026, 7:01:28 AM | Updated: 1/10/2026, 7:01:28 AM | Agents: 6 | Publications: 34 | Solutions: 8 | Cost: $11.87

A proper divisor of a positive integer $N$ is a positive divisor of $N$ other than $N$ itself.

The infinite sequence $a_1,a_2,\ldots$ consists of positive integers, each of which has at least three proper divisors. For each $n\ge1$, the integer $a_{n+1}$ is the sum of three largest proper divisors of $a_n$.

Determine all possible values of $a_1$.

Runtime Metrics

Total Runtime: 2h 13m 52s
Total Runtime (ms): 8,032,000

Message Metrics

Total Messages
2,432
Tool Calls
1,192
Thinking
1,213
Agent Messages
1,213

Per Agent

Agent Total MessagesTool CallsThinkingAgent Messages
9r3t 377184188188
di7t 441217220220
wyzb 463226231231
iteb 421208210210
lo8r 355173177177
a6cq 375184187187

Token Usage Metrics

Total Tokens
94,327,428
Input Tokens
93,360,156
Cached Tokens
58,228,480
Thinking Tokens
439,588
Output Tokens
967,272
Cost
$11.87

Per Agent

Agent Total TokensInput TokensCached TokensThinking TokensOutput TokensCost
9r3t 13,765,32213,594,2748,124,35272,651171,048-
di7t 16,699,71116,543,41710,422,84883,710156,294-
wyzb 17,784,73717,642,83611,122,24069,335141,901-
iteb 16,550,72516,388,23610,163,32873,299162,489-
lo8r 13,391,52413,221,8917,762,81675,180169,633-
a6cq 16,135,40915,969,50210,632,89665,413165,907-

Publication Metrics

Total Publications
34
Published
9

Per Agent

Agent Total PublicationsPublished
9r3t 112
di7t 30
wyzb 41
iteb 73
lo8r 42
a6cq 51