Are there infinitely many perfect numbers?
Are there infinitely many perfect numbers?
Plus
10
Ṁ3412099
88%
chance
1D
1W
1M
ALL
Get
1,000and
1.00
What is this?
What is Manifold?
Manifold is the world's largest social prediction market.
Get accurate real-time odds on politics, tech, sports, and more.
Win cash prizes for your predictions on our sweepstakes markets! Always free to play. No purchase necessary.
Are our predictions accurate?
Yes! Manifold is very well calibrated, with forecasts on average within 4 percentage points of the true probability. Our probabilities are created by users buying and selling shares of a market.
In the 2022 US midterm elections, we outperformed all other prediction market platforms and were in line with FiveThirtyEight’s performance. Many people who don't like trading still use Manifold to get reliable news.
How do I win cash prizes?
Manifold offers two market types: play money and sweepstakes.
All questions include a play money market which uses mana
and can't be cashed out.
Selected markets will have a sweepstakes toggle. These require sweepcash
to participate and winners can withdraw sweepcash as a cash prize. You can filter for sweepstakes markets on the browse page.
Redeem your sweepcash won from markets at
1.00 → $1.00, minus a 5% fee.
Learn more.Related questions
What is this?
What is Manifold?
Manifold is the world's largest social prediction market.
Get accurate real-time odds on politics, tech, sports, and more.
Win cash prizes for your predictions on our sweepstakes markets! Always free to play. No purchase necessary.
Are our predictions accurate?
Yes! Manifold is very well calibrated, with forecasts on average within 4 percentage points of the true probability. Our probabilities are created by users buying and selling shares of a market.
In the 2022 US midterm elections, we outperformed all other prediction market platforms and were in line with FiveThirtyEight’s performance. Many people who don't like trading still use Manifold to get reliable news.
How do I win cash prizes?
Manifold offers two market types: play money and sweepstakes.
All questions include a play money market which uses mana
and can't be cashed out.
Selected markets will have a sweepstakes toggle. These require sweepcash
to participate and winners can withdraw sweepcash as a cash prize. You can filter for sweepstakes markets on the browse page.
Redeem your sweepcash won from markets at
1.00 → $1.00, minus a 5% fee.
Learn more.Related questions
Are there any odd perfect numbers?
9% chance
Are there infinitely many balanced primes?
95% chance
Are there any almost perfect numbers that are not powers of 2?
17% chance
Are there infinitely many composite Fermat numbers?
98% chance
Are there infinitely many Fermat primes?
4% chance
Are there infinitely many twin primes?
95% chance
Are there infinitely many Mersenne primes?
95% chance
Are there infinitely many prime triplets?
92% chance
Are there infinitely many sexy primes?
94% chance
Are there infinitely many cousin primes?
91% chance