# Challenge time : less than 30 seconds or less than 5 seconds ? What is good?

Hello,
I saw on different forum fews things about time of response when a challenge is asked to you.

Which one can win ? Does the Time must to be less than 30 seconds or less than 5 seconds ? or another ?
Thank you.

In these following Examples (i created from some forum i saw), you have one where time is over 30 seconds and other less :

``````2021-04-27T18:24:30.907 harvester chia.harvester.harvester: INFO 8 plots were eligible for farming 65fd441b6b... Found 0 proofs. Time: 36.41071 s. Total 3213 plots

2021-04-27T18:26:30.907 harvester chia.harvester.harvester: INFO 8 plots were eligible for farming 65fd441b6b... Found 0 proofs. Time: 1.51826 s. Total 800 plots

2021-04-27T18:28:30.907 harvester chia.harvester.harvester: INFO 10 plots were eligible for farming 65fd441b6b... Found 0 proofs. Time: 7.51826 s. Total 450 plots
``````

It is my understanding that anything under 30 seconds is fine, because after 30 seconds the proofs are no longer eligible.

However, I donâ€™t know if another computer on the network returning a proof â€śfasterâ€ť will beat you to the reward?

This way to win is not very clear and i am surprised that on the chia wiki or documentation, they donâ€™t explain all these things more clearly.

A lot of people make plots but when you see the probability to win discreases day by day because the total network space increases quicklyâ€¦ I ask myself between the investment (HDD, SDD, etc.), cost of electricity, etcâ€¦ if itâ€™s really a way to make green thing and win money.

Hereâ€™s a good explanation of the winning process:

And from a comment:

It is important to add that there can be multiple winners and they all get the full reward! This is a surprising feature of the lottery for many people. All farmers with plots that pass the threshold will win 2 XCH. To keep the win rate at an acceptable level, the threshold will be adjusted up or down if more or less proofs than expected are found.

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