3. Fingerprint recognition has very wide applications in daily life. Before using fingerprint recognition, fingerprints need to be recorded first. Yingchun Electronics Factory has developed a fingerprint recording system. The first press can record $\frac{4}{5}$ of the pattern, and each subsequent press can record half of the remaining pattern. If the completeness of the fingerprint pattern is no less than $99\%$, it is considered a successful recording.
So, to successfully record a fingerprint, at least $\qquad$ presses are needed.
$6$