How long do wait before giving up on a seed?

I planted 5 seeds each in a solo cup. Tomorrow will be one week. So far only 3 have sprouted. I did not soak them in water first tho. Should I try to find the seeds and soak them? How much longer should I wait?

I’ve had older seeds take up to 7 days to sprout.

Soak in distilled water with 2/3 tsp of peroxide, like in a coffee mug; put it in a warm location like on the cable box. Add peroxide every 24 hours.

So when should I give up hope?

After 8-10 days is fair to say not a lot of hope.

I had a lot of grief getting one seed to crack. I found a suggestion in here that said to score it. I got an emery board and scratched the seed a little bit. Put it back in water and splash ofH2O2. I found a tail after, oh I don’t know, seamed like 8-10 days to get this to crack.

Yeah. It finally sprouted on day 8.