I have a column of zeros and ones

```
1
0
0
0
1
1
```

I want to find out the largest sequence of zeros I have in my column AND how many times it appears.

Answer:

With data in column **A**, in **B1** enter:

```
=IF(A1=1,0,1)
```

and in **B2** enter:

```
=IF(A2=0,1+B1,0)
```

and copy down:

the longest sequence is:

```
=MAX(B:B)
```

and the number of times it occurs is:

```
=COUNTIF(B:B,D1)
```

if the *MAX()* formula is in **D1**

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