Erdős numbers are kind of meaningless these days, as the internet has made widespread collaborations easy. For example, if you are an established person in algo

Erdős numbers are kind of meaningless these days, as the internet has made widespread collaborations easy. For example, if you are an established person in algorithms or bioinformatics, your Erdős number is probably 3. There are a still some 2s around, and keeping your number at 4 or higher takes deliberate effort.